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Communicating Winter Weather Surface Impacts
This lesson will introduce National Weather Service (NWS) forecasters to the benefits of pre-season coordination in understanding the critical needs of decision-makers, particularly the state and local Departments of Transportation (DOTs). The strategies used by DOTs to mitigate road impacts during the winter and how the NWS can best support their needs are also discussed. Learners will gain insight into the common methods of collaboration between the NWS and DOT, and the different types of winter weather events in which they work together. Learners will also practice communicating winter weat ...
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CliC Annual Report
CliC is pleased to release its 2014 Annual Report which summarizers the amazing number of activities that we sponsored, supported, and in many cases, initiated over the past few years. We hope you will take the time to read the achievements, as well as our plans for the coming year(s).
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Glacier Systems and Seasonal Snow Cover in Six Major Asian River Basins: Water Storage Properties under Changing Climate
The current status, recent and potential future changes of glacier systems and seasonal snow cover in the Indus, Ganges, Brahmaputra, Amu Darya, Syr Darya and Mekong river basins are for the first time systematically analyzed at the basin scale. The baseline (1961-1990) status of each basin’s glacier system is evaluated using a comprehensive meta-database for the 48,607 glaciers, which represents a new data product in its own right compiled specifically for this study. The data gaps in existing glacier inventories are identified and filled with expert estimates. It is illustrated that structur ...
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Arctic Report Card 2012
ssued annually since 2006, the Arctic Report Card (hereafter the Report Card) is a timely and peer-reviewed source for clear, reliable and concise environmental information on the current state of the Arctic relative to historical records. The Report Card is intended for a wide audience, including scientists, teachers, students, decision-makers and the general public interested in the Arctic environment and science.
Comprising 20 essays on different topics in the physical and biological sciences, the Report Card is organized into five sections: Atmosphere; Sea Ice & Ocean; Marin ...
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Measuring Glacier Change in the Himalayas: In UN Environment Programme (UNEP) Global Environmental Alert Service (GEAS), September 2012
UNEP, 2012A serious lack of reliable and consistent data severely hampers scientific knowledge about the state of Himalayan glaciers. As a result, the contribution of glacial melt to the Himalayan river basins remains uncertain. This is of grave importance because declining water availability could threaten the food security of more than 70 million people. There is thus an urgent need to improve cross-boundary scientific collaboration and monitoring of glaciers to bridge the knowledge gap and allow policy options to be based on appropriate scientific evidence.
Himalayan Glaciers: Climate Change, Water Resources, and Water Security
National Academies Press, 2012Scientific evidence shows that most glaciers in South Asia's Hindu Kush Himalayan region are retreating, but the consequences for the region's water supply are unclear, this report finds. The Hindu Kush Himalayan region is the location of several of Asia's great river systems, which provide water for drinking, irrigation, and other uses for about 1.5 billion people. Recent studies show that at lower elevations, glacial retreat is unlikely to cause significant changes in water availability over the next several decades, but other factors, including groundwater depletion and increasing human wat ...
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Dependence of the single-scattering properties of small ice crystals on idealized shape models
Atmospheric Chemistry and Physics (ACP), Vol. 11. N° 7. Um J.; McFarquhar G.M. - Copernicus GmbH, 2011The projections of small ice crystals (with maximum dimension <50 μm) appear quasi-circular when imaged by probes on aircraft flying through cloud. Therefore, idealized models constructed to calculate their single-scattering properties have included quasi-spherical models such as Chebyshev particles, Gaussian random spheres, and droxtals. Recently, an ice analogue grown from sodium fluorosilicate solution on a glass substrate, with several columns emanating from a common center of mass, was shown to be quasi-circular when imaged by state-of-the-art cloud probes. In this study, a new idealized ...
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Chemical composition and mixing-state of ice residuals sampled within mixed phase clouds
Atmospheric Chemistry and Physics (ACP), Vol. 11. N° 3. Ebert M.; Worringen A.; Benker N.; et al. - Copernicus GmbH, 2011During an intensive campaign at the high alpine research station Jungfraujoch, Switzerland, in February/March 2006 ice particle residuals within mixed-phase clouds were sampled using the Ice-counterflow virtual impactor (Ice-CVI). Size, morphology, chemical composition, mineralogy and mixing state of the ice residual and the interstitial (i.e., non-activated) aerosol particles were analyzed by scanning and transmission electron microscopy. Ice nuclei (IN) were identified from the significant enrichment of particle groups in the ice residual (IR) samples relative to the interstitial aerosol. In ...
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Size dependence of volume and surface nucleation rates for homogeneous freezing of supercooled water droplets
Atmospheric Chemistry and Physics (ACP), Vol. 11. N° 3. Kuhn T.; Earle M.E.; Khalizov A.F.; et al. - Copernicus GmbH, 2011The relative roles of volume and surface nucleation were investigated for the homogeneous freezing of pure water droplets. Experiments were carried out in a cryogenic laminar aerosol flow tube using supercooled water aerosols with maximum volume densities at radii between 1 and 3 μm. Temperature- and size-dependent values of volume- and surface-based homogeneous nucleation rates between 234.8 and 236.2 K were derived using a microphysical model and aerosol phase compositions and size distributions determined from infrared extinction measurements in the flow tube. The results show that the cont ...
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Mountain glaciers face the heat
Global Change magazine, Issue 76. IGBP, 2011The recognition of an error in the fourth assessment report of the Intergovernmental Panel on Climate Change put the spotlight on glaciers. Not all glaciers are about to disappear but their recession is real and so are the impacts the loss of this “stored water” will have on ecosystems and societies, Ray Bradley asserts.
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An Arctic Sea Ice Simulation Using an Ocean-Ice Coupled Model
Atmospheric and Oceanic Science Letters, Volume 3 Number 4. Sun Hong-Chuan; Zhou Guang-Qing - Science Press, 2010This paper evaluates the simulation of Arctic sea ice states using an ocean-ice coupled model that employs LASG/IAP (the State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics/ the Institute of Atmospheric Physics) Climate Ocean Model (LICOM) and the sea-ice model from the Bergen Climate Model (BCM). It is shown that the coupled model can reasonably reproduce the major characteristics of the mean state, annual cycle, and inter-annual variability of the Arctic sea ice concentration. The coupled model also shows biases that were generally pre-sented in ...
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Volume 23, Number 1 - January 2009 - Special review issue: Hydrologic effects of a shrinking cryosphere
is an issue of Hydrological Processes. Wiley-Blackwell, 2009
Jason-2: Using Satellite Altimetry to Monitor the Ocean
Altimeters onboard satellites such as Jason-2 measure sea surface height and other characteristics of the ocean surface. These characteristics are linked to underlying processes and structures, making altimetry data useful for understanding the full depth of the global ocean. This 75-minute module explores major discoveries made possible by altimetry data in oceanography, marine meteorology, the marine geosciences, climate studies, the cryosphere, and hydrology. For example, altimeters have played a vital role in detecting and monitoring sea level rise and its relation to climate change. The m ...
S-290 Unit 7: Wind Systems
S-290 Unit 7: Wind Systems outlines general and local winds and their processes. Detailed information is provided about critical fire weather winds, including frontal winds, foehn winds, and thunderstorm winds and the effects of these winds on wildland fires. The module also describes topographic influences on winds, and provides guidelines for estimating winds based on location and fuel sheltering. The module is part of the Intermediate Wildland Fire Behavior Course.
Weather and Road Management
Anticipating and dealing with weather and the hazards it creates is a real challenge for those in departments of transportation. This module gives road and highway managers a basic understanding of meteorology and weather hazards so that they can better interpret weather forecast information used to make road management decisions. The module also highlights web-based forecast products available from the National Weather Service that can help in the decision-making process.
JCOMM Technical Report, 43. Proceedings of the Ice Analysts Workshop
World Meteorological Organization (WMO) ; United Nations Educational, Scientific and Cultural Organization (UNESCO); Intergovernmental Oceanographic Commission (IOC) - WMO, 2008 (WMO/TD-No. 1441)
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Cryosphere theme report. For the monitoring of our environment from Space and from Earth : an international partnership for cooperation in Earth observations
World Meteorological Organization (WMO) ; United Nations Educational, Scientific and Cultural Organization (UNESCO); Intergovernmental Oceanographic Commission (IOC); et al. - IGOS, 2007This report aims to initiate a process that will ultimately result in a more comprehensive, coordinated, and integrated cryospheric observing system. The report starts with an Executive Summary that includes major recommendations. Chapters 1 and 2 define the cryosphere and the major applications of cryospheric data. Chapters 3-10 describe our current capabilities and requirements for observing essential climate variables (ECVs) in the major domains of the cryosphere. Each of these chapters contains domain-specific recommendations. Chapter 11 reviews the cryospheric observing system by observat ...
Fluctuations of glaciers 1995-2000 (Vol. VIII)
International Union of Geodesy and Geophysics (IUGG); United Nations Environment Programme (UNEP); United Nations Educational, Scientific and Cultural Organization (UNESCO) - 2005
Glacier Mass Balance Bulletin, No. 8 (2002-2003)
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WCRP Informal/Series Report, 8/2005. Report of the first session of the WCRP/SCAR CliC Scientific steering group (SSG)
World Meteorological Organization (WMO) ; International Council of Scientific Unions (ICSU); Intergovernmental Oceanographic Commission (IOC) - WMO, 2005
JCOMM Technical Report, 24. Ice chart colour code standard
Intergovernmental Oceanographic Commission (IOC); World Meteorological Organization (WMO) - WMO, 2004 (WMO/TD-No. 1215)While the WMO international standard for ice charts only dealt with black and white charts, in keeping with the paper facsimile technology of the time, colour has long been used to help differentiate the various ice conditions on a paper chart. In the last decade, progress in computer processing and communication, as well as increased demands of users prompted the necessity to develop a new WMO International Ice Colour Code Standard for ice charts.
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WCRP Informal/Series Report, 9/2004. Report of the fourth session of the WCRP/CliC Scientific steering group
World Meteorological Organization (WMO) ; International Council of Scientific Unions (ICSU); Intergovernmental Oceanographic Commission (IOC) - WMO, 2004
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WCRP Informal/Series Report, 7/2003. Report of the third session of the WCRP/CliC Scientific steering group
World Meteorological Organization (WMO) ; International Council of Scientific Unions (ICSU); Intergovernmental Oceanographic Commission (IOC) - WMO, 2003
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WCRP Informal/Series Report, 13/2002. Summary report on a joint meeting of the ACSYS/CliC Numerical experimentation group, observation products panel, and data management and information panel
World Meteorological Organization (WMO) ; International Council of Scientific Unions (ICSU); Intergovernmental Oceanographic Commission (IOC) - WMO, 2002
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