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Thomas P. Charlock

JANUARY 1984THOMAS P. CHARLOCK25Wavenumber Dependent Investigation of the Terrestrial Infrared Radiation Budget withTwo Versions of the LOWTRAN5 Band ModelTHOMAS P. CHARLOCK1National Center jbr Atmospheric Research,2 Boulder, CO 80307(Manuscript received 6 July 1982, in final form 9 September 1983)ABSTRACTTwo versions of the LOWTRAN5 radiance code are used in a study of the earth's clear sky infrared radiationbudget in the interval 30 cm~ (333.3 ~m) to 3530 cm~ (2.8 tim). One version uses 5 cm

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Yunjun Yao, Shunlin Liang, Qiming Qin, and Kaicun Wang

(see also Kustas and Norman 1999 , 2000 ). However, with these metrics it is difficult to obtain the surface-to-air temperature difference because of the scarcity of local ground measurements. The surface-to-air temperature difference reflects the degree of stress-induced stomatal closure of the canopy leading to decreased evaporation in the canopy. Most recently, a simple improved ET estimation method based on satellite determination of surface net radiation, vegetation index, temperature, and

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Matthew D. Flournoy, Steven B. Feldstein, Sukyoung Lee, and Eugene E. Clothiaux

1. Introduction According to the Tropically Excited Arctic Warming (TEAM) mechanism, proposed by Lee et al. (2011) and Lee (2012) , La Niña–like convection over the tropical Pacific excites poleward-propagating Rossby waves that warm the Arctic via an intensified poleward eddy heat flux, eddy-induced adiabatic descent, and an increase in downward infrared radiation (IR). These wave trains take about 10 days to propagate from the tropics to high latitudes ( Hoskins and Karoly 1981 ). Thus

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Aronne Merrelli and David D. Turner

1. Introduction High-spectral-resolution measurements of earth’s upwelling infrared radiation have proven extremely useful in a variety of atmospheric science applications. Originally developed as atmospheric sounders to infer profiles of water vapor and temperature, current instruments [Atmospheric Infrared Sounder (AIRS) and Infrared Atmospheric Sounding Interferometer (IASI)] routinely produce high-quality spectral observations. These instruments (as well as most infrared sensors) are based

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Atsushi Hamada and Noriyuki Nishi

: Radiative characteristics of cirrus clouds as retrieved from AVHRR. J. Meteor. Soc. Japan , 82 , 81 – 99 . Lhermitte , R. , 1990 : Attenuation and scattering of millimeter wavelength radiation by clouds and precipitation. J. Atmos. Oceanic Technol. , 7 , 464 – 479 . Liu , C. , E. J. Zipser , and S. W. Nesbitt , 2007 : Global distribution of tropical deep convection: Different perspectives from TRMM infrared and radar data. J. Climate , 20 , 489 – 503 . Mace , G. G. , M. Deng

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Suzanne W. Seemann, Eva E. Borbas, Robert O. Knuteson, Gordon R. Stephenson, and Hung-Lung Huang

Environmental Satellite (GOES), Spinning Enhanced Visible and Infrared Imager (SEVIRI), and High Resolution Infrared Radiation Sounder (HIRS), and is not intended for high–spectral resolution instruments such as Atmospheric Infrared Sounder (AIRS) and Geosynchronous Imaging Fourier Transform Spectrometer (GIFTS), where more detailed spectral emissivity information is required. Emissivity was derived using a procedure that fills in the spectral gaps between operational MODIS land surface emissivity product

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Likun Wang, Xiangqian Wu, Mitch Goldberg, Changyong Cao, Yaping Li, and Seung-Hee Sohn

Michelson interferometer that measures infrared radiation emitted from the earth in the infrared spectra between wavelengths of 3.6 and 15.5 μ m ( Blumstein et al. 2004 ). IASI is in a sun-synchronous polar orbit at 819 km with a 0930 equator cross in a descending node. The IASI observations are obtained by a step scanning mirror covering ±47.85° range in 30 steps in every 8.0-s scan cycle, with 3.3° for each step (normal mode). At each step, the field of regard (FOR) includes 2 × 2 1.25° fields of

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Timothy J. Schmit, Jun Li, Steven A. Ackerman, and James J. Gurka

-resolution Infrared Radiation Sounder (HIRS), a 20-channel IR sounder flown on the NOAA polar-orbiting series. Although different years (2003 versus 2004) for the month of January were investigated, AIRS shows approximately a 1.8% improvement (over the control run) at both 500 and 1000 hPa. This impact is much greater than from the HIRS, which was generally neutral for this time period. Also, after taking into account the greater number of AMSU (Advanced Microwave Sounder Unit) sensors assimilated, the AIRS

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M. Reuter, W. Thomas, P. Albert, M. Lockhoff, R. Weber, K-G. Karlsson, and J. Fischer

(AVHRR), and the Global Earth Radiation Budget (GERB) ( Harries et al. 2005 ) and Spinning Enhanced Visible and Infrared Imager (SEVIRI) radiometers ( Schmetz et al. 2002 ), respectively. The focus of CM-SAF is on the generation of climate data records although previous and ongoing work is also dealing with the generation of less demanding environmental data records, in terms of precision and accuracy [see Colton et al. (2003) for a detailed definition]. Therefore, most of the products are

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M. Carrier, X. Zou, and William M. Lapenta

1. Introduction Infrared radiances are a very useful source of information for atmospheric data assimilation. Data obtained from infrared satellites, especially hyperspectral sounders such as the Advanced Infrared Sounder (AIRS), provide valuable information regarding the atmospheric thermodynamic state at superior vertical resolution ( Pagano et al. 2002 ). Much work has been done to directly utilize radiance data in the current numerical weather prediction (NWP) environment via variational

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