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Extended deployment will obtain seasonal statistics to improve climate models
Today marks the beginning of a 20-month field campaign on Graciosa Island in the Azores to study the seasonal life cycle of marine clouds and how they modulate the global climate system. Sponsored by the U.S. Department of Energy’s Atmospheric Radiation Measurement Climate Research Facility, [...]
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As reported in mid-February, data transfer from the ACRF Tropical Western Pacific sites was greatly improved through an upgraded internet connection, which eliminated the need to ship hard disks of data from the millimeter wavelength cloud radar (MMCR) around the world. But this was only half of the story. The other, and more complicated half, [...]
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Beginning March 30 and ending April 3, the 19th Annual ARM Science Team Meeting drew 242 attendees with 156 posters to Louisville, Kentucky, for a week-long meeting. This annual meeting provides the opportunity for both researchers and infrastructure staff to discuss progress and plans in all areas of the program with colleagues from around the [...]
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Main topics: Climate and Hydrology, Environment and Human Activities, Water related risks, Integrated Water Resource Management, Ecohydrology, Computing and Technology.
Deadlines: Submission of Abstract 11/15/09; Author Notification of Abstract Acceptance 12/15/09; Submission of Full Paper 2/15/10; Author Notification of Full Paper Acceptance 3/15/10.
Contact: secretariat@balwois.com
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Coinciding with the 32nd Antarctic Treaty Consultative Meeting, the ACRF represented the U.S. Department of Energy at an international exhibition showcasing polar research efforts around the world. In celebration of the 50th anniversary of the treaty, as well as the conclusion of the 2007-2009 International Polar Year, the U.S. State Department invited several U.S. agencies and the [...]
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A comprehensive characterization of all hydrometeors in the vertical column is an important task, which is crucial for model parameterization and validation purposes. For many years, the remote sensing efforts within the Atmospheric Radiation Measurement (ARM) Program were focused primarily on either non-precipitating or only weakly-precipitating (e.g., drizzling) cloud retrievals. The simultaneous retrievals of cloud [...]
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Cirrus differs from liquid clouds in that it consists of non-spherical ice crystals which have a wide variety of shapes and sizes. To determine cirrus radiative properties, their representation in general circulation models (GCMs), and hence the influence of cirrus on the climate system, the fundamental single-scattering properties (e.g., scattering phase function P11, asymmetry parameter [...]
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Joint Fall Meetings of the CM and Aerosol Working Groups in Boulder, Colorado. The CM meeting will be held the first three days and the AWG meeting will be held the last day. POC: Ann Fridlind, NASA Goddard Institute for Space Studies (fridlind@nasa.gov)
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To the naked eye, clouds appear to have sharp boundaries; however, this is merely an illusion. Cloud boundaries are actually somewhat fuzzy, with the transition from cloud to clear stretching over as little as 50 m to as much as several hundred meters. Fuzzy cloud boundaries create major headaches for studies of aerosol [...]
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There is increasing evidence that solar radiation at the Earth’s surface has not been constant over time, but has undergone climatologically significant decadal variations. This is indicated, for example, in indirect data from sunshine duration recorders, which show substantial decadal changes since their initiation in the late 19th century.
Direct surface radiation measurements started to become [...]
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