Arctic Observation and Reanalysis Integrated System

Number of CloudSat profiles binned into 2.5° × 2.5° regions using January 2008 observations over 60°N – 90°N. Black lines are individual orbits made by CloudSat for one day of observations.
The Arctic Observation and Reanalysis Integrated System is a merged database containing a suite of satellite, reanalysis, and in situ products. The products are utilized to construct a comprehensive dataset for the community to study multiple, and often complex, processes and interactions over the arctic region. With the dramatic decline in sea ice and snow extent in previous years it is essential to characterize the surface energy budget to gain a better understanding of how Arctic amplification of temperature may manifest in the future.
Satellite and reanalysis products are matched together in the integrated product using a common spatial resolution of 2.5°×2.5° and monthly averaging timescale. Primary variables include state-of-the art satellite retrieved cloud properties, radiation fluxes (top and bottom of atmosphere), surface precipitation rates, and snow and sea ice extents. Corresponding quantities are also provided from several reanalysis products.
The dataset is geared for scientific inquiry, product validation, and assessment of the radiation and moisture budgets in the Arctic.The majority of the data products used to construct this integrated dataset have been developed and published in peer-review journals. We encourage users of this data to familiarize themselves with pertinent documentation provided by each data product contained here. Below is a short list of the merged highlighted products.


Product Image Examples

Monthly mean (a) surface downwelling longwave radiation (BOA-LWDN) and (b) all-sky cloud fraction averaged over the period between 2007 and 2010. ARM measurements (dashed black line) are obtained from Barrow Alaska on the North Slope (71.3° N, 156.6° W). Cloud fraction was measured from the ARM site using the all-sky imager. CERES (red), CloudSat (blue), GEWEX-SRB (green), NCEP (pink), ECMWF (yellow), MERRA (teal), and ASR (maroon) products are matched to the nearest 2.5° region.
Location (a) of the Greenland Climate Network (GCnet) ground-based instruments used to construct the surface net radiation annually average biases between GCnet and the collocated measurements from satellite and reanalysis products (CERES; red, CloudSat; blue, GEWEX-SRB; green, NCEP; pink, ECMWF; yellow, MERRA; teal, ASR; maroon) bar chart (b). Biases are derived from the differences in the monthly means calculated from the 2007 – 2010 period. Monthly cloud cover fraction over Greenland is derived from Clou
Binned JJA (June, July, August) average (a) NSIDC sea ice extent anomaly and (b) mean all-sky cloud cover fraction and (c) top of atmosphere reflected shortwave radiative flux calculated from 70–90°N using satellite and reanalysis products (CERES; red, CloudSat; blue, AIRS; black, GEWEX-SRB; green, NCEP; pink, ECMWF; yellow, MERRA; teal, ASR; maroon). Trend regression slope values are calculated using the entire length of the time series for each individual product. The temporal sampling period differs for
Schematic diagram of the radiative energy budget depicted for the Arctic (70–82°N). Yellow, pink, and orange streams denote the shortwave (sw) and longwave (lw) top and bottom of the atmosphere (TOA and BOA) upwelling (upward direction black arrow) and downwelling (downward direction black arrow) radiative fluxes. Squiggly and broken upward arrows denote the sensible heat (SH) and latent heat (LH) fluxes, respectively. Large orange arrow denotes the transport of flux to the Arctic to maintain radiative equi
Schematic diagram of the hydrological cycle depicted for the Arctic (70–82°N). Precipitation (downward blue arrow) and evaporation (upward red arrow) was estimated over land and ocean regions separately. Calculations were weighted by the both the cosine of the latitude and fraction of land in each grid. Runoff (purple arrow) is estimated over land and precipitation minus evaporation was estimated over the entire Arctic region. Annually averaged estimates of the moisture fluxes were calculated for the period