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Takahiro Yabe, Robert Höller, Susumu Tohno, and Mikio Kasahara

( Houghton et al. 2001 ). An evaluation of the aerosol radiative forcing on a global scale is, however, highly uncertain because of uncertainties in the optical properties and the spatial distribution of the aerosol ( Charlson et al. 1992 ; Schwartz 1996 ; Hansen et al. 1997 ). Recently, large field campaigns such as the Tropospheric Aerosol Radiative Forcing Observational Experiment (TARFOX) ( Russell et al. 1999 ), the Indian Ocean Experiment (INDOEX) ( Ramanathan et al. 2001 ), and the Asia Pacific

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Chenxi Wang, Ping Yang, Steven Platnick, Andrew K. Heidinger, Bryan A. Baum, Thomas Greenwald, Zhibo Zhang, and Robert E. Holz

of ice clouds is a challenging task because of their widely varying horizontal and vertical distributions, formation–dissipation time scales, and the complicated morphology of nonspherical ice particles ( Heymsfield and Iaquinta 2000 ; Heymsfield et al. 2002 ; Zhang et al. 2009 ). Satellite-based measurements provide an unparalleled opportunity for monitoring the global distribution of ice clouds and their optical and microphysical properties. In comparison with solar

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Min-Jeong Kim, Mark S. Kulie, Chris O’Dell, and Ralf Bennartz

paper we present a new, purely physical approach to simulate ice-particle scattering at microwave frequencies. The approach we take incorporates both realistic size distributions for the ice particles above the melting layer and scattering parameters that account for their nonspherical particle shape. In a manner similar to BP2001 , we calculate passive microwave optical properties from observed radar reflectivity data and compare forward-simulated brightness temperatures with observed data both

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E. Leontieva and K. Stamnes

NOVEMBER 1996 LEONTIEVA AND STAMNES 2011Remote Sensing of Cloud Optical Properties from Ground-BasedMeasurements of Transmittance: A Feasibility Study E. LEONTIEVA AND K. STAMNESGeophysical Institute and Department of Physics, University of Alaska, Fairbanks, Alaska(Manuscript received 16 November 1995, in final form 21 Mamh 1996)ABSTRACT The authors present a retrieval technique for the

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Andi Walther and Andrew K. Heidinger

Meteorological Satellites (EUMETSAT) MetOp series slated to continue until 2020. Therefore, the AVHRR record should span over 40 years when completed, making it one of the most valuable satellite-based data records for cloud climatological descriptions. One of the more critical components of PATMOS-x is the daytime cloud optical and microphysical properties (DCOMP) algorithm, which generates estimates of cloud optical thickness, cloud effective radius, and ice/water path during daylight conditions. Cloud

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Kenneth Sassen, Michael K. Griffin, and Gregory C. Dodd

FEBRUARY 1989 SASSEN, GRIFFIN AND DODD 91Optical Scattering and Microphysical Properties of Subvisual Cirrus Clouds, and Climatic ImplicationsKENNETH SASSEN, MICHAEL K. GRIFFIN* AND GREGORY C. DODDMeteorology Department, University of Utah, Salt Lake City, Utah(Manuscript received 29 Februax~ 1988, in final form 18 May 1988) ABSTRACT The optical and microphysical

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C. M. R. Platt

to what would happen to OFn/OAcfor temporal changes in cloud amount. He concludedthat global OF~/OAc was close to zero. However, thiswas not true for individual zones. Given a perturbation in cloud amount, various atmospheric mechanisms can feed back to either amplify or damp this perturbation. The origins of such feedback, let alone their sign, are not yet fully under stood. Much more and better data on the optical properties of clouds is needed. Because of the multi various nature of clouds

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Xiaodong Liu, Libin Yan, Ping Yang, Zhi-Yong Yin, and Gerald R. North

document the large seasonal variations in the AOD modulated by the monsoons. Moreover, the monsoon transitions can affect the microphysical and optical properties of aerosols over the tropical Indian Ocean ( Corrigan et al. 2006 ). During the boreal summer when the atmosphere over the Asian continent becomes much warmer than the neighboring ocean surface, the lower-tropospheric warm moist air moves from the Southern Ocean to the Arabian Sea, India, and the Bay of Bengal after crossing the equator and

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J. A. Coakley Jr. and G. W. Grams

developed to assess the impact of stratospheric aerosolson the global climate through their effect on the equilibrium global mean surface temperature. With theassumptions that the radiation in the atmosphere can be treated as diffuse radiation and that the effect ofthe gases in the stratosphere can be approximated by equivalent gray absorbers and scatterers, an analyticexpression which depends only on the optical properties of the aerosol and the planetary albedo is derivedfor the fractional change in

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R. M. Schotland and J. D. Copp

M^v 1982 NOTES 735 Optical Properties of a Plastic Pyranometer Head R. M. SCHOTLANO AND J. D. CoPP Institute of ~4tmospheric Physics. University of Arizona. Tucson 85721 21 September 1981 and 18 January 1982 ABSTRACT The optical characteristics of a newly designed two-step pyranomcter head are described. The head issuitable for use in the spectral

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