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  • Articles  (19)
  • Atmospheric Sciences  (19)
  • 2020-2022  (19)
  • 1
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    Modeling North Pacific temperature and pressure changes from coastal tree-ring chronologies (2021)
    In:  http://aquaticcommons.org/id/eprint/15747 | 8 | 2014-11-25 22:22:18 | 15747
    Details
    Publication Date: 2021-07-10
    Description: Climate modeling using coastal tree-ring chronologies has yielded the first summer temperature reconstructions for coastal stations along the Gulf of Alaska and the Pacific Northwest. These land temperature reconstructions are strongly correlated with nearby sea surface temperatures, indicating large-scale ocean-atmospheric influences. Significant progress has also been made in modeling winter land temperatures and sea surface temperatures from coastal and shipboard stations. In addition to temperature, the pressure variability center over the central North Pacific Ocean (PAC), which is related to the strength and location of the Aleutian Low pressure system, could be extended using coastal tree rings.
    Keywords: Atmospheric Sciences ; Oceanography ; PACLIM ; dendrochronology
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 67-78
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  • 2
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    Co-oscillation of a fjord basin’s circulation with decade-long oceanographic, hydrologic, and climatic regimes: Puget Sound 1916-'87 [abstract] (2021)
    In:  http://aquaticcommons.org/id/eprint/14410 | 8 | 2014-02-05 21:44:32 | 14410
    Details
    Publication Date: 2021-07-10
    Description: EXTRACT (SEE PDF FOR FULL ABSTRACT):Oceanographic, hydrologic, and climatic data collected during 1916-'87 in Puget Sound's Main Basin (~200 m x 5 km x 100 km) and approaches oscillate at low frequency between two regimes (I, II). The oscillation accounts for a large fraction of the interannual variability (41-75%) and the zero crossings between regimes span approximately a decade. ... The transition between regimes is accompanied by substantial changes in the horizontal pressure and density fields between the Pacific coast and the mixing zones leading to the Basin, as well as within the Basin itself.
    Keywords: Atmospheric Sciences ; Oceanography ; PACLIM
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 4-4
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  • 3
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    Using theory of change to achieve impact in AAS (2021)
    WorldFish | Penang, Malaysia
    In:  http://aquaticcommons.org/id/eprint/11246 | 115 | 2013-07-11 15:12:19 | 11246 | WorldFish Center
    Details
    Publication Date: 2021-06-30
    Description: The CGIAR Strategy and Results Framework sets out four system level outcomes (SLOs), namely: reducing rural poverty, improving food security, improving nutrition and health and sustainable management of natural resources. In pursuit of these objectives the CGIAR has developed a set of sixteen CGIAR Research Programs (CRPs), each of which is expected to make specific contributions to a range of intermediate development outcomes (IDOs) linked to the SLOs. As part of this work the CRPs are developing impact pathways and theories of change designed to explain how the programs will achieve IDOs. The purpose of the present paper is to explain the approach that the CRP on Aquatic Agricultural Systems (AAS) is taking to using these programmatic tools to help achieve impact.
    Description: CGIAR Research Program on Aquatic Agricultural Systems
    Keywords: Atmospheric Sciences ; Agriculture ; Research ; Food security ; Agriculture
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 16
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  • 4
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    1976 step in the Pacific climate: forty environmental changes between 1968-1975 and 1977-1984 (2021)
    In:  http://aquaticcommons.org/id/eprint/4562 | 111 | 2014-11-10 21:58:24 | 4562
    Details
    Publication Date: 2021-07-04
    Description: Examination of 40 time series of multidisciplinary environmental variables from the Pacific Ocean and the Americas, collected in 1968 to 1984, demonstrated the remarkable consistency of a major climate-related, step-like change in 1976. To combine the 40 variables (e.g., air and water temperatures, Southern Oscillation, chlorophyll, geese, salmon, crabs, glaciers, atmospheric dust, coral, carbon dioxide, winds, ice cover, Bering Strait transport) into a single time series, standard variants of individual annual values (subtracting the mean and dividing by a standard deviation) were averaged. Analysis of the resulting time series showed that the single step in 1976, separating the 1968-1975 period from the 1977-1984 period, accounted for 89% of variance within the composite time series. Apparently, one of the Earth's large ecosystems occasionally undergoes large abrupt shifts.
    Keywords: Atmospheric Sciences ; Ecology ; Oceanography ; Earth Sciences ; Environment ; PACLIM
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 115-126
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  • 5
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    Dendroclimatic reconstructions of temperature, precipitation, and pressure patterns over the western and central USA, 1602-1961 [abstract] (2021)
    In:  http://aquaticcommons.org/id/eprint/14414 | 8 | 2014-02-06 00:31:53 | 14414
    Details
    Publication Date: 2021-07-10
    Description: EXTRACT (SEE PDF FOR FULL ABSTRACT):Verified reconstructions of seasonal temperature, precipitation and sea-level pressure over North America and the North Pacific have been derived from 65 arid-site tree-ring chronologies in the North American West. Significant reconstructions were obtained for temperature for wide areas in the West and mid-continent. Precipitation reconstructions were significant only in the West, and pressure was reconstructed over wide areas of the North Pacific Ocean and the North American continent.
    Keywords: Atmospheric Sciences ; Earth Sciences ; PACLIM ; dendrochronology
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 6-6
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  • 6
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    Tree-ring records as indicators of air-sea interaction in the northeast Pacific sector (2021)
    In:  http://aquaticcommons.org/id/eprint/15629 | 8 | 2014-11-13 19:41:53 | 15629
    Details
    Publication Date: 2021-07-09
    Description: Climate conditions in land areas of the Pacific Northwest are strongly influenced by atmosphere/ocean variability, including fluctuations in the Aleutian Low, Pacific-North American (PNA) atmospheric circulation modes, and the El Niño-Southern Oscillation (ENSO). It thus seems likely that climatically sensitive tree-ring data from these coastal land areas would likewise reflect such climatic parameters. In this paper, tree-ring width and maximum lakewood density chronologies from northwestern Washington State and near Vancouver Island, British Columbia, are compared to surface air temperature and precipitation from nearby coastal and near-coastal land stations and to monthly sea surface temperature (SST) and sea level pressure (SLP) data from the northeast Pacific sector. Results show much promise for eventual reconstruction of these parameters, potentially extending available instrumental records for the northeastern Pacific by several hundred years or more.
    Keywords: Atmospheric Sciences ; Environment ; Oceanography ; PACLIM ; dendrochronology
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 35-45
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  • 7
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    Influence of climatography on rainfall thresholds for initiation of debris-flows on the California coast [abstract] (2021)
    In:  http://aquaticcommons.org/id/eprint/15798 | 8 | 2014-12-08 20:48:01 | 15798
    Details
    Publication Date: 2021-07-10
    Description: EXTRACT (SEE PDF FOR FULL ABSTRACT):Since 1986, the U.S. Geological Survey and National Weather Service have operated a warning system for debris flows triggered by severe rainstorms in the San Francisco Bay region. The NWS tracks storm systems as they approach the region, forecasts precipitation, and observes rainfall with a network of radiotelemetered rain gauges (ALERT). The USGS also monitors ALERT data and compares the observed and forecast rainfall to thresholds for debris-flow initiation. Both groups jointly assess debris-flow hazards and issue public advisories when rainfall conditions reach or approach critical levels.
    Keywords: Atmospheric Sciences ; Earth Sciences ; PACLIM
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 161-161
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  • 8
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    Daily rainfall along the United States Pacific Coast appears to conform to a square-root normal probability distribution (2021)
    In:  http://aquaticcommons.org/id/eprint/15826 | 8 | 2014-12-10 22:32:38 | 15826
    Details
    Publication Date: 2021-07-10
    Description: EXTRACT (SEE PDF FOR FULL ABSTRACT):As part of a study of climatic influences on landslide initiation, a statistical analysis of long-term (〉40 years) records of daily rainfall from 24 Pacific coastal stations, from San Diego to Cape Flattery, disclosed an unexpected result - the square root of the daily rainfall closely approximates a normal distribution function. ... This paper illustrates the use of the square-root-normal distribution to analyze variations in precipitation along the mainland United States Pacific Coast with examples of orographic enhancement, rain shadows, and increase in precipitation frequency with geographic latitude.
    Keywords: Atmospheric Sciences ; PACLIM
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 19-32
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  • 9
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    Climate change and salmonid production in the North Pacific Ocean (2021)
    In:  http://aquaticcommons.org/id/eprint/14588 | 8 | 2014-02-14 00:50:30 | 14588
    Details
    Publication Date: 2021-06-29
    Keywords: Atmospheric Sciences ; Ecology ; Oceanography ; PACLIM
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 33-43
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  • 10
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    Strong, low frequency (decadal) environmental fluctuations during the 20th century in the North Pacific Ocean, on the Washington coast, and in Puget Sound (2021)
    In:  http://aquaticcommons.org/id/eprint/15562 | 8 | 2014-11-06 00:59:04 | 15562
    Details
    Publication Date: 2021-07-08
    Description: At decadal period (10-20 years), dynamic linkage was evident between atmospheric low pressure systems over the North Pacific Ocean and circulation in a Pacific Northwest fjord (Puget Sound). As the Aleutian low pressure center shifts, storms arriving from the North Pacific Ocean deposit varying amounts of precipitation in the mountains draining into the estuarine system; in turn, the fluctuating addition of fresh water changes the density distribution near the fjord basin entrance sill, thereby constraining the fjord's vertical velocity structure. This linkage was examined using time series of 21 environmental parameters from 1899 to 1987. Covariation in the time series was evident because of the strong decadal cycles compared with long-term averages, interannual variability, and seasonal cycles.
    Keywords: Atmospheric Sciences ; Oceanography ; PACLIM ; hydrology
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 49-54
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