Development of Bias-Corrected Precipitation Database and Climatology for the Arctic Regions

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Development of Bias-Corrected Precipitation Database and Climatology for the Arctic Regions. Daqing Yang, Principal Investigator Douglas L. Kane, Co-Investigator Institute of Northern Engineering University of Alaska Fairbanks David R. Legates, Co-Investigator Center for Climatic Research - PowerPoint PPT Presentation

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  • Development of Bias-Corrected Precipitation Database and Climatology for the Arctic RegionsDaqing Yang, Principal InvestigatorDouglas L. Kane, Co-InvestigatorInstitute of Northern Engineering University of Alaska Fairbanks David R. Legates, Co-InvestigatorCenter for Climatic ResearchDepartment of Geography University of Delaware

  • Outline

    Background /Goals Methods- Results and applications of WMO gauge intercomparison project Data Sources Major Tasks Results/Products/Impacts

  • Uncertainties of Precipitation Records and Climatology in the Arctic regions

    Sparseness of the precipitation observation networks;

    Uneven distribution of measurement sites, i.e. biased toward coastal and the low-elevation areas;

    Spatial and temporal discontinuities of precipitation measurements induced by changes in observation methods and by different observation techniques used across national borders; and

    Biases of gauge measurements, such as wind-induced undercatch, wetting and evaporation losses, and underestimate of trace amount of precipitation.

  • Research Goals Evaluate and define the accuracy of precipitation measurements in the Arctic regions.

    Implement the consistent bias-correction methods over the pan-Arctic, i.e. Alaska, northern Canada, Siberia, northern Europe, Greenland, and the Arctic Ocean.

    Develop biased-corrected and compatible precipitation database (including grid products) and climatology for the Arctic regions as a whole.

  • fig5 (2)

    90.326056527181.723574953187.700237

    66.40831253760.08371134378.108172

    76.448947780170.568259489377.903893

    84.526020980580.769308936974.490208

    80.280032536375.557677681273.7032

    84.967916962172.380077412273.312012

    90.381716345783.603087619869.485052

    70.870348726964.707709707268.552437

    65.420684034668.925363536567.629472

    61.590479930656.311295936565.992453

    77.785288384571.478373110165.274925

    65.470396842459.235120952664.740832

    67.180851297558.418131563162.466573

    58.943587939658.943587939658.766437

    66.375297512759.000264455758.113757

    46.698887344151.614559696157.951552

    66.186421898350.510690396157.467253

    58.093825171658.093825171657.306592

    54.627248678556.233932463255.878013

    55.845882320170.257722918954.942997

    54.877232712950.105299433554.634413

    33.649110512636.453203055453.869708

    43.846845606341.940461014753.717925

    63.506301155752.429620721653.264892

    2.443.281625689852.9648

    48.908485717759.777038099452.073788

    50.241091103247.449919375250.619648

    47.319480780141.859540690148.786973

    51.999429428747.839475074448.786973

    45.469918114847.218761119247.421613

    36.515841932245.330010674447.421613

    2.812.8147.153173

    73.08166281165.468989601547.153173

    28.625595286137.044888017346.488828

    21.969324657431.384749510545.574957

    27.943464336444.03212562144.553693

    19.92898212345.551959138444.302237

    50.670654263642.473930779843.927948

    31.873868751531.873868751543.068117

    44.770565540.366903319640.040053

    51.309240942557.859356807537.888333

    38.035616121633.92365762236.572512

    21.345662658427.037839367336.473997

    13.177481816926.354963633735.321925

    18.86864116433.020122037134.225437

    17.718003186232.214551247633.525325

    13.302862248129.266296945833.439548

    27.536924853631.208514834133.439548

    14.773138592217.727766310632.684925

    30.909217800628.333449650632.119612

    4.3112.584938189431.420573

    20.265860456932.932023242531.269477

    22.155797920129.541063893430.898492

    28.810993194321.608244895727.938208

    4.94.927.6123

    5.1518.723603949626.403925

    5.2815.038905500225.870912

    11.932685948518.561955919925.646908

    5.3611.382391448425.575328

    32.56832189929.854295074125.403133

    5.8712.496481418924.271717

    13.941121207516.475870517924.256192

    21.761672149626.59759929424.069637

    6.097.722975307724.019333

    15.072107358820.09614314524.165453

    Danish Hellmann

    Hungarian Hellmann

    Hungarian Hellmann

    Danish Hellmann

    German Hellmann at Harzgerode

    Wind speed at gauge height (m/s)

    Catch ratio to the DFIR (%)

    Snow data, DFIR >3mm, Jokioinen and Harzgerode

    fig2

    fig2

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    &A

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    Hungarian Hellmann (mm)

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    a) snow

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    &A

    Page &P

    Hungarian Hellmann (mm)

    Danish Hellmann (mm)

    b) mixed

    fig4

    0.5

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