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Revisiting climate change effects on winter chill in mountain oases of northern Oman (2020)

Buerkert, Andreas ; Fernandez, Eduardo ; Tietjen, Beke ; [et al.]

Springer Netherlands

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Publication Date: 2023-06-14

Description: For centuries, traditional high-altitude oases in Oman have depended on the cultivation of deciduous fruit trees. This study explores the effects of climate change on winter chill (estimated as Chilling Hours—CH and Chill Portions—CP), a prerequisite to overcoming dormancy and initiating flowering, in three Omani oases. The results are compared with findings from an earlier study which reported a decrease in the numbers of CH in high-elevation oases by an average of 1.2–9.5 CH year−1 between 1983 and 2008. Location-specific weather data were obtained by merging 15 years of in situ recordings with 28 years of observations from an official weather station near the top of the investigated watershed. Between 1991 and 2018, scenarios of the past few decades show chill reductions by 75, 35 and 18% when estimated in CP at the oases of Masayrat ar Ruwajah (1030 m a.s.l.), Qasha’ (1640 m a.s.l.), and Al ‘Ayn (1900 m a.s.l.), respectively. Over the course of the twenty-first century, the lowest-elevation oasis at Masayrat ar Ruwajah is projected to lose virtually all winter chill, whereas, despite significant chill losses, conditions are expected to remain viable for some of the currently grown species in the higher-elevation oases. These projected changes will compromise the cultivation of temperate fruit trees in the near future, affecting the sustainability of Omani oases. Our methods support results from earlier work performed at these locations and provide an updated procedure for assessing climate change effects on temperature-dependent systems.

Description: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659

Keywords: ddc:551.6 ; Arabia ; Arid environments, ; Chill requirements ; Fruit production ; Global warming ; Warm winters

Language: English

Type: doc-type:article

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Hyperspectral absorption coefficient measurements during the cruise HE503 with RV HEINCKE (2021)

Wollschläger, Jochen ; Tietjen, Beke ; Voß, Daniela ; [et al.]

PANGAEA

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Publication Date: 2024-01-12

Description: This dataset was collected during the cruise HE503 (22.02.2018 - 01.03.2018) with RV HEINCKE from Bremerhaven, Germany to Bremerhaven, Germany. It contains absorption coefficients [m-1] from water constituents in a range of 400 to 710 nm (2 nm resolution). In total, 24 stations have been sampled. Where the water column was mixed, one sample was taken from approx. 5 m. In case of stratified water or chlorophyll-a maxima present, additional samples from greater depths were taken. The water samples were fractionated by filtration to investigate the absorption with respect to size classes. Thus, data from unfiltered samples are available as well as data from water that passed a 20 µm, 2 µm, and 0.2 µm filter, respectively (denoted as a_tot, a_20µm, a_2µm, and a_cdom). The absorption coefficient measurements were performed with a point-source integrating-cavity absorption meter (PSICAM) with a sample volume of approx. 400 ml. The specifications of the PSICAM, relevant publications, information regarding the measurements, calibration of the instrument, and data correction are provided in a separate document. Raw data are available on request from the authors. Chief Scientist of HE503: Dr. Thomas H. Badewien / Dr. Jochen Wollschläger , Institute for Chemistry and Biology of the Marine Environment (ICBM) Work related to Coastal ocean darkening - Light availability in the past and future marine environment (COD)

Keywords: absorption coefficient; Absorption coefficient, 400 nm; Absorption coefficient, 402 nm; Absorption coefficient, 404 nm; Absorption coefficient, 406 nm; Absorption coefficient, 408 nm; Absorption coefficient, 410 nm; Absorption coefficient, 412 nm; Absorption coefficient, 414 nm; Absorption coefficient, 416 nm; Absorption coefficient, 418 nm; Absorption coefficient, 420 nm; Absorption coefficient, 422 nm; Absorption coefficient, 424 nm; Absorption coefficient, 426 nm; Absorption coefficient, 428 nm; Absorption coefficient, 430 nm; Absorption coefficient, 432 nm; Absorption coefficient, 434 nm; Absorption coefficient, 436 nm; Absorption coefficient, 438 nm; Absorption coefficient, 440 nm; Absorption coefficient, 442 nm; Absorption coefficient, 444 nm; Absorption coefficient, 446 nm; Absorption coefficient, 448 nm; Absorption coefficient, 450 nm; Absorption coefficient, 452 nm; Absorption coefficient, 454 nm; Absorption coefficient, 456 nm; Absorption coefficient, 458 nm; Absorption coefficient, 460 nm; Absorption coefficient, 462 nm; Absorption coefficient, 464 nm; Absorption coefficient, 466 nm; Absorption coefficient, 468 nm; Absorption coefficient, 470 nm; Absorption coefficient, 472 nm; Absorption coefficient, 474 nm; Absorption coefficient, 476 nm; Absorption coefficient, 478 nm; Absorption coefficient, 480 nm; Absorption coefficient, 482 nm; Absorption coefficient, 484 nm; Absorption coefficient, 486 nm; Absorption coefficient, 488 nm; Absorption coefficient, 490 nm; Absorption coefficient, 492 nm; Absorption coefficient, 494 nm; Absorption coefficient, 496 nm; Absorption coefficient, 498 nm; Absorption coefficient, 500 nm; Absorption coefficient, 502 nm; Absorption coefficient, 504 nm; Absorption coefficient, 506 nm; Absorption coefficient, 508 nm; Absorption coefficient, 510 nm; Absorption coefficient, 512 nm; Absorption coefficient, 514 nm; Absorption coefficient, 516 nm; Absorption coefficient, 518 nm; Absorption coefficient, 520 nm; Absorption coefficient, 522 nm; Absorption coefficient, 524 nm; Absorption coefficient, 526 nm; Absorption coefficient, 528 nm; Absorption coefficient, 530 nm; Absorption coefficient, 532 nm; Absorption coefficient, 534 nm; Absorption coefficient, 536 nm; Absorption coefficient, 538 nm; Absorption coefficient, 540 nm; Absorption coefficient, 542 nm; Absorption coefficient, 544 nm; Absorption coefficient, 546 nm; Absorption coefficient, 548 nm; Absorption coefficient, 550 nm; Absorption coefficient, 552 nm; Absorption coefficient, 554 nm; Absorption coefficient, 556 nm; Absorption coefficient, 558 nm; Absorption coefficient, 560 nm; Absorption coefficient, 562 nm; Absorption coefficient, 564 nm; Absorption coefficient, 566 nm; Absorption coefficient, 568 nm; Absorption coefficient, 570 nm; Absorption coefficient, 572 nm; Absorption coefficient, 574 nm; Absorption coefficient, 576 nm; Absorption coefficient, 578 nm; Absorption coefficient, 580 nm; Absorption coefficient, 582 nm; Absorption coefficient, 584 nm; Absorption coefficient, 586 nm; Absorption coefficient, 588 nm; Absorption coefficient, 590 nm; Absorption coefficient, 592 nm; Absorption coefficient, 594 nm; Absorption coefficient, 596 nm; Absorption coefficient, 598 nm; Absorption coefficient, 600 nm; Absorption coefficient, 602 nm; Absorption coefficient, 604 nm; Absorption coefficient, 606 nm; Absorption coefficient, 608 nm; Absorption coefficient, 610 nm; Absorption coefficient, 612 nm; Absorption coefficient, 614 nm; Absorption coefficient, 616 nm; Absorption coefficient, 618 nm; Absorption coefficient, 620 nm; Absorption coefficient, 622 nm; Absorption coefficient, 624 nm; Absorption coefficient, 626 nm; Absorption coefficient, 628 nm; Absorption coefficient, 630 nm; Absorption coefficient, 632 nm; Absorption coefficient, 634 nm; Absorption coefficient, 636 nm; Absorption coefficient, 638 nm; Absorption coefficient, 640 nm; Absorption coefficient, 642 nm; Absorption coefficient, 644 nm; Absorption coefficient, 646 nm; Absorption coefficient, 648 nm; Absorption coefficient, 650 nm; Absorption coefficient, 652 nm; Absorption coefficient, 654 nm; Absorption coefficient, 656 nm; Absorption coefficient, 658 nm; Absorption coefficient, 660 nm; Absorption coefficient, 662 nm; Absorption coefficient, 664 nm; Absorption coefficient, 666 nm; Absorption coefficient, 668 nm; Absorption coefficient, 670 nm; Absorption coefficient, 672 nm; Absorption coefficient, 674 nm; Absorption coefficient, 676 nm; Absorption coefficient, 678 nm; Absorption coefficient, 680 nm; Absorption coefficient, 682 nm; Absorption coefficient, 684 nm; Absorption coefficient, 686 nm; Absorption coefficient, 688 nm; Absorption coefficient, 690 nm; Absorption coefficient, 692 nm; Absorption coefficient, 694 nm; Absorption coefficient, 696 nm; Absorption coefficient, 698 nm; Absorption coefficient, 700 nm; Absorption coefficient, 702 nm; Absorption coefficient, 704 nm; Absorption coefficient, 706 nm; Absorption coefficient, 708 nm; Absorption coefficient, 710 nm; Coastal ocean darkening – Light availability in the past and future marine environment; COD; CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; ELEVATION; Event label; Filtration under low vacuum (〈 200 mbar); Fraction, description; German Bight; HE503; HE503_11-1; HE503_13-1; HE503_15-1; HE503_17-1; HE503_19-1; HE503_2-1; HE503_21-1; HE503_22-1; HE503_24-1; HE503_26-1; HE503_29-1; HE503_30-1; HE503_32-1; HE503_34-1; HE503_36-1; HE503_37-2; HE503_39-1; HE503_41-1; HE503_42-1; HE503_44-1; HE503_46-1; HE503_5-1; HE503_7-1; HE503_9-1; Heincke; hyperspectral; ICBM; Identification; Institut für Chemie und Biologie des Meeres; IOP; LATITUDE; LONGITUDE; North Sea; Point-source integrating-cavity absorption meter; PSICAM; Station label

Type: Dataset

Format: text/tab-separated-values, 17490 data points

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Hyperspectral absorption coefficient measurements during the cruise HE527 with RV HEINCKE (2021)

Wollschläger, Jochen ; Tietjen, Beke ; Voß, Daniela ; [et al.]

PANGAEA

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Details

Publication Date: 2024-01-12

Description: This dataset was collected during the cruise HE527 (19.03.2019 - 31.03.2019) with RV HEINCKE from Bremerhaven, Germany to Bremerhaven, Germany. It contains absorption coefficients [m-1] from water constituents in a range of 400 to 710 nm (2 nm resolution). In total, 34 stations have been sampled. Where the water column was mixed, one sample was taken from approx. 5 m. In case of stratified water or chlorophyll-a maxima present, additional samples from greater depths were taken. The water samples were fractionated by filtration to investigate the absorption with respect to size classes. Thus, data from unfiltered samples are available as well as data from water that passed a 20 µm, 2 µm, and 0.2 µm filter, respectively (denoted as a_tot, a_20µm, a_2µm, and a_cdom). The absorption coefficient measurements were performed with a point-source integrating-cavity absorption meter (PSICAM) with a sample volume of approx. 400 ml. The specifications of the PSICAM, relevant publications, information regarding the measurements, calibration of the instrument, and data correction are provided in a separate document. Raw data are available on request from the authors. Supplementary Information attached. Chief Scientist of HE527: Dr. Thomas Badewien, Institute for Chemistry and Biology of the Marine Environment (ICBM). Work related to Coastal ocean darkening - Light availability in the past and future marine environment (COD).

Keywords: absorption coefficient; Absorption coefficient, 400 nm; Absorption coefficient, 402 nm; Absorption coefficient, 404 nm; Absorption coefficient, 406 nm; Absorption coefficient, 408 nm; Absorption coefficient, 410 nm; Absorption coefficient, 412 nm; Absorption coefficient, 414 nm; Absorption coefficient, 416 nm; Absorption coefficient, 418 nm; Absorption coefficient, 420 nm; Absorption coefficient, 422 nm; Absorption coefficient, 424 nm; Absorption coefficient, 426 nm; Absorption coefficient, 428 nm; Absorption coefficient, 430 nm; Absorption coefficient, 432 nm; Absorption coefficient, 434 nm; Absorption coefficient, 436 nm; Absorption coefficient, 438 nm; Absorption coefficient, 440 nm; Absorption coefficient, 442 nm; Absorption coefficient, 444 nm; Absorption coefficient, 446 nm; Absorption coefficient, 448 nm; Absorption coefficient, 450 nm; Absorption coefficient, 452 nm; Absorption coefficient, 454 nm; Absorption coefficient, 456 nm; Absorption coefficient, 458 nm; Absorption coefficient, 460 nm; Absorption coefficient, 462 nm; Absorption coefficient, 464 nm; Absorption coefficient, 466 nm; Absorption coefficient, 468 nm; Absorption coefficient, 470 nm; Absorption coefficient, 472 nm; Absorption coefficient, 474 nm; Absorption coefficient, 476 nm; Absorption coefficient, 478 nm; Absorption coefficient, 480 nm; Absorption coefficient, 482 nm; Absorption coefficient, 484 nm; Absorption coefficient, 486 nm; Absorption coefficient, 488 nm; Absorption coefficient, 490 nm; Absorption coefficient, 492 nm; Absorption coefficient, 494 nm; Absorption coefficient, 496 nm; Absorption coefficient, 498 nm; Absorption coefficient, 500 nm; Absorption coefficient, 502 nm; Absorption coefficient, 504 nm; Absorption coefficient, 506 nm; Absorption coefficient, 508 nm; Absorption coefficient, 510 nm; Absorption coefficient, 512 nm; Absorption coefficient, 514 nm; Absorption coefficient, 516 nm; Absorption coefficient, 518 nm; Absorption coefficient, 520 nm; Absorption coefficient, 522 nm; Absorption coefficient, 524 nm; Absorption coefficient, 526 nm; Absorption coefficient, 528 nm; Absorption coefficient, 530 nm; Absorption coefficient, 532 nm; Absorption coefficient, 534 nm; Absorption coefficient, 536 nm; Absorption coefficient, 538 nm; Absorption coefficient, 540 nm; Absorption coefficient, 542 nm; Absorption coefficient, 544 nm; Absorption coefficient, 546 nm; Absorption coefficient, 548 nm; Absorption coefficient, 550 nm; Absorption coefficient, 552 nm; Absorption coefficient, 554 nm; Absorption coefficient, 556 nm; Absorption coefficient, 558 nm; Absorption coefficient, 560 nm; Absorption coefficient, 562 nm; Absorption coefficient, 564 nm; Absorption coefficient, 566 nm; Absorption coefficient, 568 nm; Absorption coefficient, 570 nm; Absorption coefficient, 572 nm; Absorption coefficient, 574 nm; Absorption coefficient, 576 nm; Absorption coefficient, 578 nm; Absorption coefficient, 580 nm; Absorption coefficient, 582 nm; Absorption coefficient, 584 nm; Absorption coefficient, 586 nm; Absorption coefficient, 588 nm; Absorption coefficient, 590 nm; Absorption coefficient, 592 nm; Absorption coefficient, 594 nm; Absorption coefficient, 596 nm; Absorption coefficient, 598 nm; Absorption coefficient, 600 nm; Absorption coefficient, 602 nm; Absorption coefficient, 604 nm; Absorption coefficient, 606 nm; Absorption coefficient, 608 nm; Absorption coefficient, 610 nm; Absorption coefficient, 612 nm; Absorption coefficient, 614 nm; Absorption coefficient, 616 nm; Absorption coefficient, 618 nm; Absorption coefficient, 620 nm; Absorption coefficient, 622 nm; Absorption coefficient, 624 nm; Absorption coefficient, 626 nm; Absorption coefficient, 628 nm; Absorption coefficient, 630 nm; Absorption coefficient, 632 nm; Absorption coefficient, 634 nm; Absorption coefficient, 636 nm; Absorption coefficient, 638 nm; Absorption coefficient, 640 nm; Absorption coefficient, 642 nm; Absorption coefficient, 644 nm; Absorption coefficient, 646 nm; Absorption coefficient, 648 nm; Absorption coefficient, 650 nm; Absorption coefficient, 652 nm; Absorption coefficient, 654 nm; Absorption coefficient, 656 nm; Absorption coefficient, 658 nm; Absorption coefficient, 660 nm; Absorption coefficient, 662 nm; Absorption coefficient, 664 nm; Absorption coefficient, 666 nm; Absorption coefficient, 668 nm; Absorption coefficient, 670 nm; Absorption coefficient, 672 nm; Absorption coefficient, 674 nm; Absorption coefficient, 676 nm; Absorption coefficient, 678 nm; Absorption coefficient, 680 nm; Absorption coefficient, 682 nm; Absorption coefficient, 684 nm; Absorption coefficient, 686 nm; Absorption coefficient, 688 nm; Absorption coefficient, 690 nm; Absorption coefficient, 692 nm; Absorption coefficient, 694 nm; Absorption coefficient, 696 nm; Absorption coefficient, 698 nm; Absorption coefficient, 700 nm; Absorption coefficient, 702 nm; Absorption coefficient, 704 nm; Absorption coefficient, 706 nm; Absorption coefficient, 708 nm; Absorption coefficient, 710 nm; Coastal ocean darkening – Light availability in the past and future marine environment; COD; CTD/Rosette; CTD-RO; DATE/TIME; DEPTH, water; ELEVATION; Event label; Filtration under low vacuum (〈 200 mbar); Fraction, description; German Bight; HE527; HE527_10-1; HE527_12-1; HE527_14-1; HE527_16-1; HE527_18-1; HE527_20-1; HE527_2-1; HE527_22-1; HE527_24-2; HE527_26-1; HE527_28-1; HE527_30-1; HE527_3-1; HE527_32-1; HE527_34-1; HE527_36-1; HE527_38-1; HE527_42-1; HE527_43-1; HE527_44-1; HE527_45-1; HE527_46-1; HE527_47-1; HE527_48-1; HE527_49-1; HE527_50-1; HE527_5-1; HE527_51-1; HE527_53-1; HE527_55-1; HE527_57-1; HE527_58-1; HE527_60-1; HE527_62-1; HE527_64-1; HE527_66-1; HE527_68-1; HE527_70-1; HE527_7-1; Heincke; hyperspectral; ICBM; Identification; Institut für Chemie und Biologie des Meeres; IOP; LATITUDE; LONGITUDE; North Sea; Point-source integrating-cavity absorption meter; PSICAM; Station label

Type: Dataset

Format: text/tab-separated-values, 24327 data points

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