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Intissar Keghouche, Laurent Bertino, and Knut Arild Lisæter

change in c w or c a has a stronger impact on small icebergs and the effect of Coriolis force is larger on large icebergs. By linking the three clouds together with a linear regression, we found slopes of 0.35, 0.32, 0.31, and 0.29 for icebergs 7089, 7088, 7087, and 7086, respectively. These values represent the optimal ratio between c w and c a in our model, which is independent of the mass. The relation between the optimal c w and c a and the iceberg mass M is apparently linear. A

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Norman G. Loeb, Seiji Kato, Konstantin Loukachine, Natividad Manalo-Smith, and David R. Doelling

effective radius errors and their effect on computed domain-averaged irradiances. J. Geophys. Res. , 111 . D17201, doi:10.1029/2005JD006668 . Li, Z. , and Leighton H. G. , 1991 : Scene identification and its effect on cloud radiative forcing in the Arctic. J. Geophys. Res. , 96 , 9175 – 9188 . 10.1029/91JD00529 Loeb, N. G. , and Davies R. , 1996 : Observational evidence of plane parallel model biases: The apparent dependence of cloud optical depth on solar zenith angle. J. Geophys

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Xuanze Zhang, Xiaogu Zheng, Zhian Sun, and San Luo

anthropogenic and volcanic influences, solar forcing, land use, emissions or concentrations of short-lived species, and natural and anthropogenic aerosols ( Taylor et al. 2012 ). In this study, monthly outputs of CMIP5 modeled atmospheric profiles (such as pressure, temperature, specific humidity, and cloud liquid water content) and of surface properties (i.e., surface pressure, surface wind at 10 m, surface temperature at 2 m, skin temperature, surface sea temperature, elevation, cloud cover, etc.) were

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Margaret M. Wonsick, Rachel T. Pinker, Wen Meng, and Louis Nguyen

, 64 , 317 – 327 . 10.1007/PL00012589 Stowe, L. L. , Davis P. A. , and McClain E. P. , 1999 : Scientific basis and initial evaluation of the CLAVR-1 global clear cloud classification algorithm for the Advanced Very High Resolution Radiometer. J. Atmos. Oceanic Technol , 16 , 656 – 681 . 10.1175/1520-0426(1999)016<0656:SBAIEO>2.0.CO;2 Sui, C-H. , Rienecker M. M. , Li X. , Lau K-M. , Laszlo I. , and Pinker R. T. , 2003 : The role of daily surface forcing in the upper ocean

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Jørgen B. Jensen and Graciela B. Raga

eliminated by forcing the Lyman-acloud-base temperature to equal the reverse-flow sensormeasurement of cloud-base temperature. The standarddeviation of this offset is only 0.23-C for all 15 calibrations. Differences between the EG&amp;G sensor timeconstants at low levels (20-C) and high altitudes (5-C)will nevertheless contribute to the error of the Lymana calibration. It is not feasible to make an exact uncertainty calculation of the Lyman-a calibration. The calibrationdrifts with time, but in the

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Odran Sourdeval, Gérard Brogniez, Jacques Pelon, Laurent C.-Labonnote, Philippe Dubuisson, Frédéric Parol, Damien Josset, Anne Garnier, Michaël Faivre, and Andreas Minikin

1. Introduction Cirrus clouds generally occur at altitudes of about 6 km and permanently cover nearly 30% of the globe ( Warren et al. 1988 ). Their impact on the earth radiation budget has been clearly identified as one of the major issues in climate research ( Liou 1986 ). In this regard, improvements in our knowledge of cirrus clouds have been made a primary objective of the World Climate Research Programme ( WCP 1986 ). Reliable model predictions of their impact require an appropriate

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J. N. Porter, B. R. Lienert, S. K. Sharma, E. Lau, and K. Horton

1. Introduction Small-scale aerosol variability in the coastal marine boundary layer can have significant effects on atmospheric visibility and extinction of light. For instance, under calm dry conditions (few clouds) one can clearly see Molokai and Maui (60 and 100 km away) from Oahu, Hawaii, but under windy conditions with large spray, even the Molokai outline is not discernible. Understanding and modeling these aerosol fields is of interest for imaging, laser ranging, and optical

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David M. Babb, Johannes Verlinde, and Bert W. Rust

. Comput. Graph. Stat., 3, 67–96. 10.1080/10618600.1994.10474631 Stevens, G. L., and P. J. Webster, 1979: Sensitivity of radiative forcing to variable cloud and moisture. J. Atmos. Sci., 36, 1542–1553. 10.1175/1520-0469(1979)036<1542:SORFTV>2.0.CO;2 Stokes, G. M., and S. E. Schwartz, 1994: The Atmospheric Radiation Measurement (ARM) Program: Programmatic background and design of the cloud and radiation test bed. Bull. Amer. Meteor. Soc., 75, 1201–1221. 10

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James G. Hudson

S-nuclei start growing earlier and continue to have agreater driving force for growth and thus maintain agreater size than the higher Sc nuclei which are onlyactivated to cloud droplet growth in the later stages ofthe cloud chamber. This tends to disperse the dropletHUDSON 1057spectrum according to the S- of the nuclei. Droplet sizeis thus inversely related to So. Separate temperature control of each section allowsa variety of functional

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Robin J. Hogan, Malcolm E. Brooks, Anthony J. Illingworth, David P. Donovan, Claire Tinel, Dominique Bouniol, and J. Pedro V. Poiares Baptista

1. Introduction Ice clouds play an important role in the radiation budget of the earth ( Liou 1986 ), but the global, vertically resolved observations necessary to evaluate their representation in climate models are lacking. Brown et al. (1995) estimated that spaceborne 94-GHz radar should be able to retrieve ice water content (IWC) to within a factor of 2, reducing to around ±40% if additional information were available on particle size. The combination of radar and lidar has the potential

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