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Baseline (1961-1990) average winter total precipitation and projected change in precipitation for the northern portion of Alaska. For the purposes of these maps, ‘winter’ is defined as December - February. The Alaska portion of the Arctic LCC’s terrestrial boundary is depicted by the black line. Baseline results for 1961-1990 are derived from Climate Research Unit (CRU) TS 3.1.01 data and downscaled to 2km grids; results for the other time periods (2010-2039, 2040-2069, 2070-2099) are based on the SNAP 5-GCM composite using the AR5-RCP 8.5, downscaled to 2km grids.
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Average historical annual total precipitation (inches) and projected relative change in total precipitation (% change from baseline) for Northern Alaska. 30-year averages. Handout format. Maps created using the SNAP 5-GCM composite (AR5-RCP 8.5) and CRU TS3.1.01 datasets.
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Baseline (1961-1990) average winter temperature in and projected change in temperature for for the northern portion of Alaska. For the purposes of these maps, ‘winter’ is defined as December - February. The Alaska portion of the Arctic LCC’s terrestrial boundary is depicted by the black line. Baseline results for 1961-1990 are derived from Climate Research Unit (CRU) TS3.1 data and downscaled to 2km grids; results for the other time periods (2010-2039, 2040-2069, 2070-2099) are based on the SNAP 5-GCM composite using the AR5-RCP 8.5, downscaled to 2km grids.
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Average historical annual total precipitation (mm) and projected relative change in total precipitation (% change from baseline) for Northern Alaska. 30-year averages. Handout format. Maps created using the SNAP 5-GCM composite (AR5-RCP 8.5) and CRU TS3.1.01 datasets.
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There is a great deal of interest in whether and how Alaska’s precipitation is changing but little agreement in the existing peer-reviewed literature. To provide insight on this question, we have selected three commonly used 0.5° resolution gridded precipitation products that have long-term monthly data coverage (Climatic Research Unit TS3.10.1, Global Precipitation Climatology Centre Full Data Reanalysis version 5, and University of Delaware version 2.01) and evaluated their homogeneity and trends with multiple methods over two periods, 1950–2008 and 1980–2008. All three data sets displayed common broadscale features of Alaska’s precipitation climatology, but there were substantial differences between them in terms...
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Average historical annual total precipitation (mm) and projected relative change in total precipitation (% change from baseline) for Northern Alaska. 30-year averages. Handout format. Maps created using the SNAP 5-GCM composite (AR5-RCP 6.0) and CRU TS3.1.01 datasets.
There are many challenges in detecting precipitation trends in Alaska. The most substantial are the small number of observations, inhomogeneities, differences among gridded data sets, and differentiating between long-term trends and decadal variability. Analyzing both station and regional products will increase our understanding of where local trends in precipitation may differ significantly from regional trends, providing key information for developing better downscaled climate projections. These in turn, will provide insight into fine scale heterogeneity in climate change that may be important in determining the stability of key habitat features, such as wetlands and insect avoidance areas. As a by-product of...
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Average historical annual total precipitation, projected total precipitation (mm), and relative change in total precipitation (% change from baseline) for Northern Alaska. GIF formatted animation and PNG images. Maps created using the SNAP 5-GCM composite (AR5-RCP 6.0) and CRU TS3.1.01 datasets.
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Baseline (1961-1990) average winter temperature in and projected change in temperature for for the northern portion of Alaska. For the purposes of these maps, ‘winter’ is defined as December - February. The Alaska portion of the Arctic LCC’s terrestrial boundary is depicted by the black line. Baseline results for 1961-1990 are derived from Climate Research Unit (CRU) TS3.1 data and downscaled to 2km grids; results for the other time periods (2010-2039, 2040-2069, 2070-2099) are based on the SNAP 5-GCM composite using the AR5-RCP 8.5, downscaled to 2km grids.
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Baseline (1961-1990) average winter temperature in and projected change in temperature for for the northern portion of Alaska. For the purposes of these maps, ‘winter’ is defined as December - February. The Alaska portion of the Arctic LCC’s terrestrial boundary is depicted by the black line. Baseline results for 1961-1990 are derived from Climate Research Unit (CRU) TS3.1 data and downscaled to 2km grids; results for the other time periods (2010-2039, 2040-2069, 2070-2099) are based on the SNAP 5-GCM composite using the AR5-RCP 8.5, downscaled to 2km grids.
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This is a collection of GIF-format animations and PNG images that are suitable for presentations. These products include images for the baseline period (1961-1990) and images for each decade between 2010 and 2090. Baseline values are derived from Climate Research Unit (CRU) TS 3.1. or TS 3.1.01 data; values for future time periods are based on the SNAP 5-GCM composite under the AR5-RCP 6.0 and AR5-RCP 8.5. CRU and GCM data are provided courtesy of Scenarios Network for Alaska and Arctic Planning (SNAP).Air temperature is expressed in units of Celsius (у) and Fahrenheit (ц) and precipitation is available in units of millimeters (mm) and inches (in). Special note about animations: The first image of the animation...
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Baseline (1961-1990) average air temperature (degree F) for Alaska and Western Canada. This zip file contains three GeoTIFF rasters. The file names identifies whether a file represents an annual mean or a seasonal mean (i.e., summer or winter). Summer is defined as June - August; winter is defined as December - February. Baseline data are derived from Climate Research Unit (CRU) TS 3.1 data. CRU data courtesy of Scenarios Network for Alaska and Arctic Planning.
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The maps show baseline (1961-1990) average air temperature and projected air temperature for the decades spanning 2010-2039, 2040-2069, and 2070-2099. Temperature is expressed in both Celsius (у) and Fahrenheit (ц). Baseline results for 1961-1990 are derived from Climate Research Unit (CRU) TS 3.1. data and maps for future time periods are based on a composite of projections from five GCMs (CCSM4, GFDL-CM3, GISS-E2-R, IPSL-CM5A-LR, and MRI-CGCM3) under the AR5-RCP 6.0. Data courtesy of Scenarios Network for Alaska and Arctic Planning.
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Baseline (1961-1990) average total precipitation (mm) for Alaska and Western Canada. Baseline results for 1961-1990 are derived from Climate Research Unit (CRU) TS 3.1.01 data. Data courtesy of Scenarios Network for Alaska and Arctic Planning. The file names identifies whether a file represents an annual (i.e., annual) mean or a seasonal mean (i.e., summer or winter). Summer is defined as June - August; winter is defined as December - February.
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Average historical annual total precipitation (inches) and projected relative change in total precipitation (% change from baseline) for Northern Alaska. 30-year averages. Handout format. Maps created using the SNAP 5-GCM composite (AR5-RCP 6.0) and CRU TS3.1.01 datasets.
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Average historical annual temperature, projected air temperature, and change in air temperature (degree F) for Northern Alaska. GIF formatted animation and PNG images. Maps created using the SNAP 5-GCM composite (AR5-RCP 8.5) and CRU TS3.1 datasets.
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Numerous studies have evaluated precipitation trends in Alaska and come to different conclusions. These studies differ in analysis period and methodology and do not address the issue of temporal homogeneity. To reconcile these conflicting results, we selected 29 stations with largely complete monthly records, screened them for homogeneity, and then evaluated trend over two analysis periods (1950–2010 and 1980–2010) using three methods: least absolute deviation regression, ordinary least squares regression (with and without transformation), and Mann-Kendall trend testing following removal of first-order autocorrelation. We found that differences in analytical period had a significant impact on trends and that the...
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These maps show baseline (1961-1990) average total precipitation and projected change in precipitation for the decades spanning 2010-2039, 2040-2069, and 2070-2099. Precipitation is expressed in both millimeters (mm) and inches (in); projected change in precipitation is expressed as percent of baseline. Baseline results for 1961-1990 are derived from Climate Research Unit (CRU) TS 3.1.01 data and maps for future time periods are based on a composite of projections from five GCMs (CCSM4, GFDL-CM3, GISS-E2-R, IPSL-CM5A-LR, and MRI-CGCM3) under the AR5-RCP 6.0. Data courtesy of Scenarios Network for Alaska and Arctic Planning.
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Baseline (1961-1990) average air temperature (degree C) for Alaska and Western Canada. This zip file contains three GeoTIFF rasters. The file names identifies whether a file represents an annual mean or a seasonal mean (i.e., summer or winter). Summer is defined as June - August; winter is defined as December - February. Baseline data are derived from Climate Research Unit (CRU) TS 3.1 data. CRU data courtesy of Scenarios Network for Alaska and Arctic Planning.


map background search result map search result map Annual Precipitation Maps - RCP 8.5, Inches Annual Precipitation Maps - RCP 6.0, Millimeters Annual Precipitation Maps - RCP 6.0, Inches Reconciling precipitation trends in Alaska: 2. Gridded data analyses Reconciling precipitation trends in Alaska: Comparison of trends in gridded precipitation products and station records Winter Precipitation Maps - RCP 8.5, Inches Animations and Presentation Materials Winter Temperature Maps - RCP 8.5, Fahrenheit Reconciling precipitation trends in Alaska: 1. Station-based analyses Annual Temperature Maps - RCP 6.0, Fahrenheit Precipitation Projection Maps - RCP 6.0 Summer Temperature Maps - RCP 6.0, Fahrenheit Temperature Projection Maps - RCP 6.0 Baseline 1961-1990 Average Air Temperature, Celsius Baseline 1961-1990 Average Air Temperature, Fahrenheit Annual Precipitation Animation - RCP 6.0, Millimeters Annual Temperature Animation - RCP 8.5, Fahrenheit Annual Precipitation Maps - RCP 8.5, Millimeters Baseline 1961-1990 Average Total Precipitation, Millimeters Baseline (1961-1990) Rasters Reconciling precipitation trends in Alaska: 2. Gridded data analyses Reconciling precipitation trends in Alaska: Comparison of trends in gridded precipitation products and station records Reconciling precipitation trends in Alaska: 1. Station-based analyses Annual Precipitation Maps - RCP 8.5, Inches Annual Precipitation Maps - RCP 6.0, Millimeters Annual Precipitation Maps - RCP 6.0, Inches Winter Precipitation Maps - RCP 8.5, Inches Animations and Presentation Materials Winter Temperature Maps - RCP 8.5, Fahrenheit Annual Temperature Maps - RCP 6.0, Fahrenheit Precipitation Projection Maps - RCP 6.0 Summer Temperature Maps - RCP 6.0, Fahrenheit Temperature Projection Maps - RCP 6.0 Baseline 1961-1990 Average Air Temperature, Celsius Baseline 1961-1990 Average Air Temperature, Fahrenheit Annual Precipitation Animation - RCP 6.0, Millimeters Annual Temperature Animation - RCP 8.5, Fahrenheit Annual Precipitation Maps - RCP 8.5, Millimeters Baseline 1961-1990 Average Total Precipitation, Millimeters Baseline (1961-1990) Rasters