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  • 1
    Publication Date: 2023-03-16
    Keywords: ANT-XXVIII/3; AWI_MarGeoChem; Carbon, organic, particulate; Carbon, organic, particulate/Thorium-234 ratio; Carbon, organic, particulate/Thorium-234 ratio, standard deviation; Date/Time of event; DEPTH, water; Elevation of event; Event label; In situ pump; ISP; Latitude of event; Longitude of event; Marine Geochemistry @ AWI; Nitrogen, organic, particulate; Nitrogen, organic, particulate/Thorium-234 ratio; Nitrogen, organic, particulate/Thorium-234 ratio, standard deviation; Polarstern; PS79; PS79/057-5; PS79/069-4; PS79/081-3; PS79/084-11; PS79/091-10; PS79/139-13; PS79/174-17; South Atlantic Ocean; Thorium-234, particulate; Thorium-234, particulate, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 154 data points
    Location Call Number Expected Availability
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  • 2
    Publication Date: 2023-03-16
    Keywords: ANT-XXVIII/3; AWI_MarGeoChem; Bottle number; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Elevation of event; Event label; Latitude of event; Longitude of event; Marine Geochemistry @ AWI; Polarstern; PS79; PS79/057-4; PS79/063-2; PS79/069-5; PS79/075-9; PS79/081-5; PS79/084-12; PS79/085-3; PS79/086-2; PS79/087-2; PS79/091-1; PS79/091-5; PS79/093-4; PS79/095-1; PS79/095-3; PS79/102-1; PS79/102-3; PS79/106-1; PS79/106-4; PS79/115-1; PS79/115-4; PS79/119-1; PS79/119-3; PS79/128-14; PS79/129-1; PS79/137-7; PS79/139-3; PS79/139-6; PS79/140-12; PS79/147-1; PS79/152-1; PS79/166-1; PS79/170-1; PS79/173-1; PS79/174-20; South Atlantic Ocean; Thorium-234, total; Thorium-234, total, standard deviation; Thorium-234/Uranium-238 activity ratio; Thorium-234/Uranium-238 activity ratio, standard deviation; Uranium-238; Uranium-238, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 2261 data points
    Location Call Number Expected Availability
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  • 3
    Publication Date: 2023-03-16
    Keywords: ANT-XXVIII/3; AWI_MarGeoChem; Carbon, organic, particulate, flux; Carbon, organic, particulate/Thorium-234 ratio; Carbon, organic, particulate/Thorium-234 ratio, standard deviation; Date/Time of event; DEPTH, water; Duration; Elevation of event; Event label; Latitude of event; Longitude of event; Marine Geochemistry @ AWI; Nitrogen, organic, particulate, flux; Nitrogen, organic, particulate/Thorium-234 ratio; Nitrogen, organic, particulate/Thorium-234 ratio, standard deviation; Polarstern; PS79; PS79/086-4; PS79/087-1; PS79/091-3; PS79/098-1; PS79/100-1; PS79/114-1; PS79/128-12; PS79/136-11; PS79/137-1; PS79/139-1; PS79/140-1; South Atlantic Ocean; Trap, sediment; TRAPS
    Type: Dataset
    Format: text/tab-separated-values, 139 data points
    Location Call Number Expected Availability
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  • 4
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    Unknown
    PANGAEA
    In:  Supplement to: Roca-Martí, Montserrat; Puigcorbé, Viena; Iversen, Morten Hvitfeldt; Rutgers van der Loeff, Michiel M; Klaas, Christine; Cheah, Wee; Bracher, Astrid; Masqué, Pere (2015): High particulate organic carbon export during the decline of a vast diatom bloom in the Atlantic sector of the Southern Ocean. Deep Sea Research Part II: Topical Studies in Oceanography, https://doi.org/10.1016/j.dsr2.2015.12.007
    Publication Date: 2023-08-01
    Description: Carbon fixation by phytoplankton plays a key role in the uptake of atmospheric CO2 in the Southern Ocean. Yet, it still remains unclear how efficiently the particulate organic carbon (POC) is exported and transferred from ocean surface waters to depth during phytoplankton blooms. In addition, little is known about the processes that control the flux attenuation within the upper twilight zone. Here, we present results of downward POC and particulate organic nitrogen fluxes during the decline of a vast diatom bloom in the Atlantic sector of the Southern Ocean in summer 2012. We used thorium-234 (234Th) as a particle tracer in combination with drifting sediment traps (ST). Their simultaneous use evidenced a sustained high export rate of 234Th at 100 m depth in the weeks prior to and during the sampling period. The entire study area, of approximately 8000 km**2, showed similar vertical export fluxes in spite of the heterogeneity in phytoplankton standing stocks and productivity, indicating a decoupling between production and export. The POC fluxes at 100 m were high, averaging 26 ± 15 mmol C/m**2/d, although the strength of the biological pump was generally low. Only 〈20% of the daily primary production reached 100 m, presumably due to an active recycling of carbon and nutrients. Pigment analyses indicated that direct sinking of diatoms likely caused the high POC transfer efficiencies (~60%) observed between 100 and 300 m, although faecal pellets and transport of POC linked to zooplankton vertical migration might have also contributed to downward fluxes.
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 5
    Publication Date: 2023-11-03
    Description: Water samples were collected from the two-week SO218 SHIVA-Sonne cruise which covered a transect from Singapore (1.26 N, 103.82 E) to Manila (14.59 N, 120.97 E), crossing the shelf areas of both South China Sea (SCS) and Sulu Sea (SS), and the deep water basin in the SS. Wtaer samples were taken from the ship's moonpool during underway and from CTD Niskin bottles at six different depths from the upper 150 m during CTD station. An additional sampling of surface waters at 1, 5, and 10 m were carried out at two near shore stations by local small boat. For locations of underway, local and CTD stations see Fig. 1 in Cheah et al. 2013. All collected samples were filtered through 25 cm Whatman GF/F filters, respectively, under low-vacuum pressure (below 200 mbar), and then immediately shock-frozen in liquid nitrogen and stored at −80°C for later analysis in the lab. Measurements of the phytoplankton absorption were carried out on a dual-beam UV/VIS spectrophotometer (Cary 4000, Varian Inc.) equipped with a 150 mm integrating sphere (external DRA-900, Varian, Inc. and Labsphere Inc., made from Spectralon (TM)) using a quantitative filterpad technique modified as described in details in Taylor et al. (2011). The data set is also collocated to Bracher (2014) phytoplankton pigment data and Bracher et al. (2021) particulate absorption data.
    Keywords: absorption; Absorption coefficient, phytoplankton, at 300 nm; Absorption coefficient, phytoplankton, at 301 nm; Absorption coefficient, phytoplankton, at 302 nm; Absorption coefficient, phytoplankton, at 303 nm; Absorption coefficient, phytoplankton, at 304 nm; Absorption coefficient, phytoplankton, at 305 nm; Absorption coefficient, phytoplankton, at 306 nm; Absorption coefficient, phytoplankton, at 307 nm; Absorption coefficient, phytoplankton, at 308 nm; Absorption coefficient, phytoplankton, at 309 nm; Absorption coefficient, phytoplankton, at 310 nm; Absorption coefficient, phytoplankton, at 311 nm; Absorption coefficient, phytoplankton, at 312 nm; Absorption coefficient, phytoplankton, at 313 nm; Absorption coefficient, phytoplankton, at 314 nm; Absorption coefficient, phytoplankton, at 315 nm; Absorption coefficient, phytoplankton, at 316 nm; Absorption coefficient, phytoplankton, at 317 nm; Absorption coefficient, phytoplankton, at 318 nm; Absorption coefficient, phytoplankton, at 319 nm; Absorption coefficient, phytoplankton, at 320 nm; Absorption coefficient, phytoplankton, at 321 nm; Absorption coefficient, phytoplankton, at 322 nm; Absorption coefficient, phytoplankton, at 323 nm; Absorption coefficient, phytoplankton, at 324 nm; Absorption coefficient, phytoplankton, at 325 nm; Absorption coefficient, phytoplankton, at 326 nm; Absorption coefficient, phytoplankton, at 327 nm; Absorption coefficient, phytoplankton, at 328 nm; Absorption coefficient, phytoplankton, at 329 nm; Absorption coefficient, phytoplankton, at 330 nm; Absorption coefficient, phytoplankton, at 331 nm; Absorption coefficient, phytoplankton, at 332 nm; Absorption coefficient, phytoplankton, at 333 nm; Absorption coefficient, phytoplankton, at 334 nm; Absorption coefficient, phytoplankton, at 335 nm; Absorption coefficient, phytoplankton, at 336 nm; Absorption coefficient, phytoplankton, at 337 nm; Absorption coefficient, phytoplankton, at 338 nm; Absorption coefficient, phytoplankton, at 339 nm; Absorption coefficient, phytoplankton, at 340 nm; Absorption coefficient, phytoplankton, at 341 nm; Absorption coefficient, phytoplankton, at 342 nm; Absorption coefficient, phytoplankton, at 343 nm; Absorption coefficient, phytoplankton, at 344 nm; Absorption coefficient, phytoplankton, at 345 nm; Absorption coefficient, phytoplankton, at 346 nm; Absorption coefficient, phytoplankton, at 347 nm; Absorption coefficient, phytoplankton, at 348 nm; Absorption coefficient, phytoplankton, at 349 nm; Absorption coefficient, phytoplankton, at 350 nm; Absorption coefficient, phytoplankton, at 351 nm; Absorption coefficient, phytoplankton, at 352 nm; Absorption coefficient, phytoplankton, at 353 nm; Absorption coefficient, phytoplankton, at 354 nm; Absorption coefficient, phytoplankton, at 355 nm; Absorption coefficient, phytoplankton, at 356 nm; Absorption coefficient, phytoplankton, at 357 nm; Absorption coefficient, phytoplankton, at 358 nm; Absorption coefficient, phytoplankton, at 359 nm; Absorption coefficient, phytoplankton, at 360 nm; Absorption coefficient, phytoplankton, at 361 nm; Absorption coefficient, phytoplankton, at 362 nm; Absorption coefficient, phytoplankton, at 363 nm; Absorption coefficient, phytoplankton, at 364 nm; Absorption coefficient, phytoplankton, at 365 nm; Absorption coefficient, phytoplankton, at 366 nm; Absorption coefficient, phytoplankton, at 367 nm; Absorption coefficient, phytoplankton, at 368 nm; Absorption coefficient, phytoplankton, at 369 nm; Absorption coefficient, phytoplankton, at 370 nm; Absorption coefficient, phytoplankton, at 371 nm; Absorption coefficient, phytoplankton, at 372 nm; Absorption coefficient, phytoplankton, at 373 nm; Absorption coefficient, phytoplankton, at 374 nm; Absorption coefficient, phytoplankton, at 375 nm; Absorption coefficient, phytoplankton, at 376 nm; Absorption coefficient, phytoplankton, at 377 nm; Absorption coefficient, phytoplankton, at 378 nm; Absorption coefficient, phytoplankton, at 379 nm; Absorption coefficient, phytoplankton, at 380 nm; Absorption coefficient, phytoplankton, at 381 nm; Absorption coefficient, phytoplankton, at 382 nm; Absorption coefficient, phytoplankton, at 383 nm; Absorption coefficient, phytoplankton, at 384 nm; Absorption coefficient, phytoplankton, at 385 nm; Absorption coefficient, phytoplankton, at 386 nm; Absorption coefficient, phytoplankton, at 387 nm; Absorption coefficient, phytoplankton, at 388 nm; Absorption coefficient, phytoplankton, at 389 nm; Absorption coefficient, phytoplankton, at 390 nm; Absorption coefficient, phytoplankton, at 391 nm; Absorption coefficient, phytoplankton, at 392 nm; Absorption coefficient, phytoplankton, at 393 nm; Absorption coefficient, phytoplankton, at 394 nm; Absorption coefficient, phytoplankton, at 395 nm; Absorption coefficient, phytoplankton, at 396 nm; Absorption coefficient, phytoplankton, at 397 nm; Absorption coefficient, phytoplankton, at 398 nm; Absorption coefficient, phytoplankton, at 399 nm; Absorption coefficient, phytoplankton, at 400 nm; Absorption coefficient, phytoplankton, at 401 nm; Absorption coefficient, phytoplankton, at 402 nm; Absorption coefficient, phytoplankton, at 403 nm; Absorption coefficient, phytoplankton, at 404 nm; Absorption coefficient, phytoplankton, at 405 nm; Absorption coefficient, phytoplankton, at 406 nm; Absorption coefficient, phytoplankton, at 407 nm; Absorption coefficient, phytoplankton, at 408 nm; Absorption coefficient, phytoplankton, at 409 nm; Absorption coefficient, phytoplankton, at 410 nm; Absorption coefficient, phytoplankton, at 411 nm; Absorption coefficient, phytoplankton, at 412 nm; Absorption coefficient, phytoplankton, at 413 nm; Absorption coefficient, phytoplankton, at 414 nm; Absorption coefficient, phytoplankton, at 415 nm; Absorption coefficient, phytoplankton, at 416 nm; Absorption coefficient, phytoplankton, at 417 nm; Absorption coefficient, phytoplankton, at 418 nm; Absorption coefficient, phytoplankton, at 419 nm; Absorption coefficient, phytoplankton, at 420 nm; Absorption coefficient, phytoplankton, at 421 nm; Absorption coefficient, phytoplankton, at 422 nm; Absorption coefficient, phytoplankton, at 423 nm; Absorption coefficient, phytoplankton, at 424 nm; Absorption coefficient, phytoplankton, at 425 nm; Absorption coefficient, phytoplankton, at 426 nm; Absorption coefficient, phytoplankton, at 427 nm; Absorption coefficient, phytoplankton, at 428 nm; Absorption coefficient, phytoplankton, at 429 nm; Absorption coefficient, phytoplankton, at 430 nm; Absorption coefficient, phytoplankton, at 431 nm; Absorption coefficient, phytoplankton, at 432 nm; Absorption coefficient, phytoplankton, at 433 nm; Absorption coefficient, phytoplankton, at 434 nm; Absorption coefficient, phytoplankton, at 435 nm; Absorption coefficient, phytoplankton, at 436 nm; Absorption coefficient, phytoplankton, at 437 nm; Absorption coefficient, phytoplankton, at 438 nm; Absorption coefficient, phytoplankton, at 439 nm; Absorption coefficient, phytoplankton, at 440 nm; Absorption coefficient, phytoplankton, at 441 nm; Absorption coefficient, phytoplankton, at 442 nm; Absorption coefficient, phytoplankton, at 443 nm; Absorption coefficient, phytoplankton, at 444 nm; Absorption coefficient, phytoplankton, at 445 nm; Absorption coefficient, phytoplankton, at 446 nm; Absorption coefficient, phytoplankton, at 447 nm; Absorption coefficient, phytoplankton, at 448 nm; Absorption coefficient, phytoplankton, at 449 nm; Absorption coefficient, phytoplankton, at 450 nm; Absorption coefficient, phytoplankton, at 451 nm; Absorption coefficient, phytoplankton, at 452 nm; Absorption coefficient, phytoplankton, at 453 nm; Absorption coefficient, phytoplankton, at 454 nm; Absorption coefficient, phytoplankton, at 455 nm; Absorption coefficient, phytoplankton, at 456 nm; Absorption coefficient, phytoplankton, at 457 nm; Absorption coefficient, phytoplankton, at 458 nm; Absorption coefficient,
    Type: Dataset
    Format: text/tab-separated-values, 91347 data points
    Location Call Number Expected Availability
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  • 6
    Publication Date: 2023-11-03
    Description: Water samples were collected from the two-week SO218 SHIVA-Sonne cruise which covered a transect from Singapore (1.26 N, 103.82 E) to Manila (14.59 N, 120.97 E), crossing the shelf areas of both South China Sea (SCS) and Sulu Sea (SS), and the deep water basin in the SS. Wtaer samples were taken from the ship's moonpool during underway and from CTD Niskin bottles at six different depths from the upper 150 m during CTD station. An additional sampling of surface waters at 1, 5, and 10 m were carried out at two near shore stations by local small boat. For locations of underway, local and CTD stations see Fig. 1 in Cheah et al. 2013. All collected samples were filtered through 25 cm Whatman GF/F filters, respectively, under low-vacuum pressure (below 200 mbar), and then immediately shock-frozen in liquid nitrogen and stored at −80°C for later analysis in the lab. Measurement for total particulate matter absorption spectra between 350 to 800 nm were carried out using a Cary 4000 UV/VIS dual beam spectrophotometer equipped with a 150 mm integrating sphere (Varian Inc., USA). The method is described in details in Taylor et al. (2011). The data set is also collocated to Bracher (2014) phytoplankton pigment data.
    Keywords: absorption coefficient; Absorption coefficient, 300 nm; Absorption coefficient, total particulate matter, at 301 nm; Absorption coefficient, total particulate matter, at 302 nm; Absorption coefficient, total particulate matter, at 303 nm; Absorption coefficient, total particulate matter, at 304 nm; Absorption coefficient, total particulate matter, at 305 nm; Absorption coefficient, total particulate matter, at 306 nm; Absorption coefficient, total particulate matter, at 307 nm; Absorption coefficient, total particulate matter, at 308 nm; Absorption coefficient, total particulate matter, at 309 nm; Absorption coefficient, total particulate matter, at 310 nm; Absorption coefficient, total particulate matter, at 311 nm; Absorption coefficient, total particulate matter, at 312 nm; Absorption coefficient, total particulate matter, at 313 nm; Absorption coefficient, total particulate matter, at 314 nm; Absorption coefficient, total particulate matter, at 315 nm; Absorption coefficient, total particulate matter, at 316 nm; Absorption coefficient, total particulate matter, at 317 nm; Absorption coefficient, total particulate matter, at 318 nm; Absorption coefficient, total particulate matter, at 319 nm; Absorption coefficient, total particulate matter, at 320 nm; Absorption coefficient, total particulate matter, at 321 nm; Absorption coefficient, total particulate matter, at 322 nm; Absorption coefficient, total particulate matter, at 323 nm; Absorption coefficient, total particulate matter, at 324 nm; Absorption coefficient, total particulate matter, at 325 nm; Absorption coefficient, total particulate matter, at 326 nm; Absorption coefficient, total particulate matter, at 327 nm; Absorption coefficient, total particulate matter, at 328 nm; Absorption coefficient, total particulate matter, at 329 nm; Absorption coefficient, total particulate matter, at 330 nm; Absorption coefficient, total particulate matter, at 331 nm; Absorption coefficient, total particulate matter, at 332 nm; Absorption coefficient, total particulate matter, at 333 nm; Absorption coefficient, total particulate matter, at 334 nm; Absorption coefficient, total particulate matter, at 335 nm; Absorption coefficient, total particulate matter, at 336 nm; Absorption coefficient, total particulate matter, at 337 nm; Absorption coefficient, total particulate matter, at 338 nm; Absorption coefficient, total particulate matter, at 339 nm; Absorption coefficient, total particulate matter, at 340 nm; Absorption coefficient, total particulate matter, at 341 nm; Absorption coefficient, total particulate matter, at 342 nm; Absorption coefficient, total particulate matter, at 343 nm; Absorption coefficient, total particulate matter, at 344 nm; Absorption coefficient, total particulate matter, at 345 nm; Absorption coefficient, total particulate matter, at 346 nm; Absorption coefficient, total particulate matter, at 347 nm; Absorption coefficient, total particulate matter, at 348 nm; Absorption coefficient, total particulate matter, at 349 nm; Absorption coefficient, total particulate matter, at 350 nm; Absorption coefficient, total particulate matter, at 351 nm; Absorption coefficient, total particulate matter, at 352 nm; Absorption coefficient, total particulate matter, at 353 nm; Absorption coefficient, total particulate matter, at 354 nm; Absorption coefficient, total particulate matter, at 355 nm; Absorption coefficient, total particulate matter, at 356 nm; Absorption coefficient, total particulate matter, at 357 nm; Absorption coefficient, total particulate matter, at 358 nm; Absorption coefficient, total particulate matter, at 359 nm; Absorption coefficient, total particulate matter, at 360 nm; Absorption coefficient, total particulate matter, at 361 nm; Absorption coefficient, total particulate matter, at 362 nm; Absorption coefficient, total particulate matter, at 363 nm; Absorption coefficient, total particulate matter, at 364 nm; Absorption coefficient, total particulate matter, at 365 nm; Absorption coefficient, total particulate matter, at 366 nm; Absorption coefficient, total particulate matter, at 367 nm; Absorption coefficient, total particulate matter, at 368 nm; Absorption coefficient, total particulate matter, at 369 nm; Absorption coefficient, total particulate matter, at 370 nm; Absorption coefficient, total particulate matter, at 371 nm; Absorption coefficient, total particulate matter, at 372 nm; Absorption coefficient, total particulate matter, at 373 nm; Absorption coefficient, total particulate matter, at 374 nm; Absorption coefficient, total particulate matter, at 375 nm; Absorption coefficient, total particulate matter, at 376 nm; Absorption coefficient, total particulate matter, at 377 nm; Absorption coefficient, total particulate matter, at 378 nm; Absorption coefficient, total particulate matter, at 379 nm; Absorption coefficient, total particulate matter, at 380 nm; Absorption coefficient, total particulate matter, at 381 nm; Absorption coefficient, total particulate matter, at 382 nm; Absorption coefficient, total particulate matter, at 383 nm; Absorption coefficient, total particulate matter, at 384 nm; Absorption coefficient, total particulate matter, at 385 nm; Absorption coefficient, total particulate matter, at 386 nm; Absorption coefficient, total particulate matter, at 387 nm; Absorption coefficient, total particulate matter, at 388 nm; Absorption coefficient, total particulate matter, at 389 nm; Absorption coefficient, total particulate matter, at 390 nm; Absorption coefficient, total particulate matter, at 391 nm; Absorption coefficient, total particulate matter, at 392 nm; Absorption coefficient, total particulate matter, at 393 nm; Absorption coefficient, total particulate matter, at 394 nm; Absorption coefficient, total particulate matter, at 395 nm; Absorption coefficient, total particulate matter, at 396 nm; Absorption coefficient, total particulate matter, at 397 nm; Absorption coefficient, total particulate matter, at 398 nm; Absorption coefficient, total particulate matter, at 399 nm; Absorption coefficient, total particulate matter, at 400 nm; Absorption coefficient, total particulate matter, at 401 nm; Absorption coefficient, total particulate matter, at 402 nm; Absorption coefficient, total particulate matter, at 403 nm; Absorption coefficient, total particulate matter, at 404 nm; Absorption coefficient, total particulate matter, at 405 nm; Absorption coefficient, total particulate matter, at 406 nm; Absorption coefficient, total particulate matter, at 407 nm; Absorption coefficient, total particulate matter, at 408 nm; Absorption coefficient, total particulate matter, at 409 nm; Absorption coefficient, total particulate matter, at 410 nm; Absorption coefficient, total particulate matter, at 411 nm; Absorption coefficient, total particulate matter, at 412 nm; Absorption coefficient, total particulate matter, at 413 nm; Absorption coefficient, total particulate matter, at 414 nm; Absorption coefficient, total particulate matter, at 415 nm; Absorption coefficient, total particulate matter, at 416 nm; Absorption coefficient, total particulate matter, at 417 nm; Absorption coefficient, total particulate matter, at 418 nm; Absorption coefficient, total particulate matter, at 419 nm; Absorption coefficient, total particulate matter, at 420 nm; Absorption coefficient, total particulate matter, at 421 nm; Absorption coefficient, total particulate matter, at 422 nm; Absorption coefficient, total particulate matter, at 423 nm; Absorption coefficient, total particulate matter, at 424 nm; Absorption coefficient, total particulate matter, at 425 nm; Absorption coefficient, total particulate matter, at 426 nm; Absorption coefficient, total particulate matter, at 427 nm; Absorption coefficient, total particulate matter, at 428 nm; Absorption coefficient, total particulate matter, at 429 nm; Absorption coefficient, total particulate matter, at 430 nm; Absorption
    Type: Dataset
    Format: text/tab-separated-values, 91348 data points
    Location Call Number Expected Availability
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  • 7
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    Unknown
    PANGAEA
    In:  Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven | Supplement to: Booge, Dennis; Schlundt, Michael; Bracher, Astrid; Endres, Sonja; Zäncker, Birthe; Marandino, Christa A (2018): Marine isoprene production and consumption in the mixed layer of the surface ocean - a field study over two oceanic regions. Biogeosciences, 15(2), 649-667, https://doi.org/10.5194/bg-15-649-2018
    Publication Date: 2023-08-29
    Description: We present a data set on the concentration of various phytoplankton pigments using High Pressure Liquid Chromatography (HPLC) during the Jula August 2014 RV Sonne cruises SO234 and SO235 in the tropical Indian Ocean.
    Keywords: 19-Butanoyloxyfucoxanthin; 19-Hexanoyloxyfucoxanthin; Alloxanthin; alpha-Carotene; Antheraxanthin; Arabian Sea; Astaxanthin; beta-Carotene; Chlorophyll a; Chlorophyll b; Chlorophyll c1+c2; Chlorophyll c3; Chlorophyllide a; CT; CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; Diadinoxanthin; Diatoxanthin; Dinoxanthin; Divinyl chlorophyll a; Divinyl chlorophyll b; Event label; Fucoxanthin; Gear; Gyroxanthin diester; High Performance Liquid Chromatography (HPLC); HPLC analysis; Indian Ocean; LATITUDE; LONGITUDE; Lutein; Mozambique Channel; Neoxanthin; OASIS; Peridinin; Pheophorbide a; Pheophytin a; Pheophytin b; phytoplankton pigment concentrations; Pyropheophorbide a; Pyropheophytin a; SO234/2; SO234/2_18-2; SO234/2_19-1; SO234/2_20-1; SO234/2_21-1; SO234/2_23-1; SO234/2_23-2; SO234/2_23-3; SO234/2_23-4; SO234/2_23-5; SO234/2_23-6; SO234/2_23-7; SO234/2_25-1; SO234/2_26-1; SO234/2-track; SO235; SO235_01-1; SO235_02-1; SO235_02-11; SO235_02-6; SO235_02-9; SO235_04-1; SO235_04-3; SO235_04-5; SO235_04-8; SO235_06-1; SO235_07-1; SO235_08-1; SO235_09-1; SO235_10-2; SO235_11-1; SO235_13-1; SO235_13-3; SO235_13-5; SO235_13-9; SO235_14-2; SO235_15-1; SO235-track; Sonne; SPACES II; Station label; Tropical Indian Ocean; Underway cruise track measurements; Violaxanthin; Zeaxanthin
    Type: Dataset
    Format: text/tab-separated-values, 11648 data points
    Location Call Number Expected Availability
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  • 8
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    Unknown
    PANGAEA
    In:  Supplement to: Hoppe, Clara Jule Marie; Klaas, Christine; Ossebaar, Sharyn; Soppa, Mariana A; Cheah, Wee; Laglera, Luis Miguel; Santos-Echeandía, Juan; Rost, Björn; Wolf-Gladrow, Dieter A; Bracher, Astrid; Hoppema, Mario; Strass, Volker H; Trimborn, Scarlett (2017): Controls of primary production in two phytoplankton blooms in the Antarctic Circumpolar Current. Deep Sea Research Part II: Topical Studies in Oceanography, 138, 63-73, https://doi.org/10.1016/j.dsr2.2015.10.005
    Publication Date: 2023-10-18
    Description: The Antarctic Circumpolar Current has a high potential for primary production and carbon sequestration through the biological pump. In the current study, two large-scale blooms observed in 2012 during a cruise with R.V. Polarstern were investigated with respect to phytoplankton standing stocks, primary productivity and nutrient budgets. While net primary productivity was similar in both blooms, chlorophyll a -specific photosynthesis was more efficient in the bloom closer to the island of South Georgia (39 °W, 50 °S) compared to the open ocean bloom further east (12 °W, 51 °S). We did not find evidence for light being the driver of bloom dynamics as chlorophyll standing stocks up to 165 mg/m² developed despite mixed layers as deep as 90 m. Since the two bloom regions differ in their distance to shelf areas, potential sources of iron vary. Nutrient (nitrate, phosphate, silicate) deficits were similar in both areas despite different bloom ages, but their ratios indicated more pronounced iron limitation at 12 °W compared to 39 °W. While primarily the supply of iron and not the availability of light seemed to control onset and duration of the blooms, higher grazing pressure could have exerted a stronger control toward the declining phase of the blooms.
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 9
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Cheah, Wee; Soppa, Mariana A; Wiegmann, Sonja; Ossebaar, Sharyn; Laglera, Luis Miguel; Strass, Volker H; Santos-Echeandía, Juan; Hoppema, Mario; Wolf-Gladrow, Dieter A; Bracher, Astrid (2016): Importance of deep mixing and silicic acid in regulating phytoplankton biomass and community in the iron-limited Antarctic Polar Front region in summer. Deep Sea Research Part II: Topical Studies in Oceanography, 12 pp, https://doi.org/10.1016/j.dsr2.2016.05.019
    Publication Date: 2023-10-18
    Description: Phytoplankton community structure and their physiological response in the vicinity of the Antarctic Polar Front (APF; 44°S to 53°S, centred at 10°E) were investigated as part of the ANT-XXVIII/3 Eddy-Pump cruise conducted in austral summer 2012. Our results show that under iron-limited (〈 0.3 µmol/m**3) conditions, high total chlorophyll-a (TChl-a) concentrations (〉 0.6 mg/m**3) can be observed at stations with deep mixed layer (〉 60 m) across the APF. In contrast, light was excessive at stations with shallower mixed layer and phytoplankton were producing higher amounts of photoprotective pigments, diadinoxanthin (DD) and diatoxanthin (DT), at the expense of TChl-a, resulting in higher ratios of (DD+DT)/ TChl-a. North of the APF, significantly lower silicic acid (Si(OH)4) concentrations (〈 2 mmol/m**3) lead to the domination of nanophytoplankton consisting mostly of haptophytes, which produced higher ratios of (DD+DT)/TChl-a under relatively low irradiance conditions. The Si(OH)4 replete (〉 5 mmol/m**3) region south of the APF, on the contrary, was dominated by microphytoplankton (diatoms and dinoflagellates) with lower ratios of (DD+DT)/TChl-a, despite having been exposed to higher levels of irradiance. The significant correlation between nanophytoplankton and (DD+DT)/TChl-a indicates that differences in taxon-specific response to light are also influencing TChl-a concentration in the APF during summer. Our results reveal that provided mixing is deep and Si(OH)4 is replete, TChl-a concentrations higher than 0.6 mg/m**3 are achievable in the iron-limited APF waters during summer.
    Keywords: ANT-XXVIII/3; CHEMTAX (Lewitus et al., 2005); Chlorophytes; Cryptophytes; CTD/Rosette; CTD-RO; Cyanobacteria; Date/Time of event; DEPTH, water; Diatoms; Dinoflagellates; Elevation of event; Event label; Haptophytes; In situ pump; ISP; Latitude of event; Longitude of event; Polarstern; Prasinophytes; PS79; PS79/057-4; PS79/060-5; PS79/061-1; PS79/062-1; PS79/063-2; PS79/064-1; PS79/065-1; PS79/066-1; PS79/068-1; PS79/069-4; PS79/070-3; PS79/073-2; PS79/074-1; PS79/075-9; PS79/076-2; PS79/077-1; PS79/078-1; PS79/079-1; PS79/080-1; PS79/081-11; PS79/081-5; PS79/082-1; PS79/083-1; PS79/084-9; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 1090 data points
    Location Call Number Expected Availability
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  • 10
    Publication Date: 2023-10-18
    Keywords: ANT-XXVIII/3; Area/locality; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Elevation of event; Event label; Latitude of event; Longitude of event; Nitrate; Phosphate; Polarstern; PS79; PS79/087-2; PS79/088-1; PS79/092-1; PS79/093-1; PS79/095-3; PS79/096-1; PS79/101-1; PS79/102-1; PS79/103-1; PS79/104-1; PS79/105-1; PS79/106-1; PS79/107-1; PS79/108-1; PS79/109-1; PS79/110-1; PS79/111-1; PS79/112-1; PS79/114-2; PS79/115-1; PS79/116-1; PS79/117-1; PS79/118-1; PS79/119-3; PS79/120-1; PS79/121-1; PS79/122-2; PS79/123-1; PS79/124-1; PS79/125-1; PS79/126-1; PS79/127-2; PS79/128-10; PS79/137-7; PS79/144-2; PS79/145-1; PS79/146-1; PS79/147-1; PS79/148-1; PS79/149-1; PS79/150-1; PS79/151-1; PS79/152-1; PS79/153-1; PS79/154-1; PS79/155-1; PS79/156-1; PS79/157-1; PS79/158-1; PS79/159-1; PS79/160-1; PS79/161-1; PS79/162-2; PS79/163-1; PS79/164-1; Silicate; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 2589 data points
    Location Call Number Expected Availability
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