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首页> 外文会议>Algorithms and technologies for multispectral, hyperspectral, and ultraspectral imagery XIX >A Decade of Measured Greenhouse Forcings from AIRS
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A Decade of Measured Greenhouse Forcings from AIRS

机译：AIRS十年来测得的温室强迫

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Increased greenhouse gasses reduce the transmission of Outgoing Longwave Radiation (OLR) to space along spectral absorption lines eventually causing the Earth's temperature to rise in order to preserve energy equilibrium. This greenhouse forcing effect can be directly observed in the Outgoing Longwave Spectra (OLS) from space-borne infrared instruments with sufficiently high resolving power ~(3,8) . In 2001, Harries et. al observed significant increases in greenhouse forcings by direct inter-comparison of the IRIS spectra 1970 and the IMG spectra 1997~8. We have extended this effort by measuring the annual rate of change of AIRS all-sky Outgoing Longwave Spectra (OLS) with respect to greenhouse forcings. Our calculations make use of a 2°×2° degree monthly gridded Brightness Temperature (BT) product. Decadal trends for AIRS spectra from 2002-2012 indicate continued decrease of-0.06 K/yr in the trend of CO2 BT (700cm1 and 2250cm~(-1)), a decrease of-0.04 K/yr of 03 BT (1050 cm~(-1)), and a decrease of-0.03 K/yr of the CH4 BT (1300cm~(-1)). Observed decreases in BT trends are expected due to ten years of increased greenhouse gasses even though global surface temperatures have not risen substantially over the last decade.
机译：增加的温室气体减少了长波辐射（OLR）沿光谱吸收线向太空的传输，最终导致地球温度升高，以保持能量平衡。这种温室强迫效应可以直接从具有足够高分辨力〜（3,8）的星载红外仪器的出射长波光谱（OLS）中观察到。在2001年，Harries等。通过对IRIS光谱1970和IMG光谱1997〜8的直接比较，观察到温室强迫显着增加。我们通过测量AIRS全天候长波光谱（OLS）相对于温室强迫的年变化率来扩展这项工作。我们的计算使用的是每月2°×2°度的网格化亮度温度（BT）产品。 AIRS光谱从2002-2012年的年代际变化趋势表明，CO2 BT（700cm1和2250cm〜（-1））趋势持续下降-0.06 K / yr，03 BT（1050 cm〜）下降-0.04 K / yr （-1）），并且CH4 BT（1300cm〜（-1））降低-0.03 K / yr。尽管近十年来全球地表温度并未大幅上升，但由于温室气体排放量增加了十年，预计BT趋势也将下降。

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