Final report for the project "Improving the understanding of surface-atmosphere radiative interactions by mapping surface reflectance over the ARM CART site" (award DE-FG02-02ER63351)

Alexander P. Trishchenko ; Yi Luo ; Konstantin V. Khlopenkov, William M. Park ; Zhanqing Li ; Maureen Cribb

关键词: ABSORPTION;    ALBEDO;    CLIMATES;    FORECASTING;    GREENHOUSE GASES;    RADIATIONS;    SEASONS;    SOLAR ENERGY;    SOLAR RADIATION;    SPECTRAL REFLECTANCE;    SURFACE ENERGY;    WEATHER surface albedo;    atmospheric radiation;    MODIS;    AVHRR;    VGT;    field meeasurements;    ARM;   

DOI  :  10.2172/942122
RP-ID  :  DOE/ER/63351-1
PID  :  OSTI ID: 942122
Others  :  TRN: US201014%%235

美国|英语

来源: SciTech Connect

【 摘 要 】

Surface spectral reflectance (albedo) is a fundamental variable affecting the transfer of solar radiation and the Earth’s climate. It determines the proportion of solar energy absorbed by the surface and reflected back to the atmosphere. The International Panel on Climate Change (IPCC) identified surface albedo among key factors influencing climate radiative forcing. Accurate knowledge of surface reflective properties is important for advancing weather forecasting and climate change impact studies. It is also important for determining radiative impact and acceptable levels of greenhouse gases in the atmosphere, which makes this work strongly linked to major scientific objectives of the Climate Change Research Division (CCRD) and Atmospheric Radiation Measurement (ARM) Program. Most significant accomplishments of eth project are listed below. I) Surface albedo/BRDF datasets from 1995 to the end of 2004 have been produced. They were made available to the ARM community and other interested users through the CCRS public ftp site ftp://ftp.ccrs.nrcan.gc.ca/ad/CCRS_ARM/ and ARM IOP data archive under “PI data Trishchenko”. II) Surface albedo properties over the ARM SGP area have been described for 10-year period. Comparison with ECMWF data product showed some deficiencies in the ECMWF surface scheme, such as missing some seasonal variability and no dependence on sky-conditions which biases surface energy budget and has some influence of the diurnal cycle of upward radiation and atmospheric absorption. III) Four surface albedo Intensive Observation Period (IOP) Field Campaigns have been conducted for every season (August, 2002, May 2003, February 2004 and October 2004). Data have been prepared, documented and transferred to ARM IOP archive. Nine peer-reviewed journal papers and 26 conference papers have been published.