The full list of projects contains the entire database hosted on this portal, across the available directories. The projects and activities (across all directories/catalogs) are also available by country of origin, by geographical region, or by directory.

Displaying: 121 - 129 of 129
121. Monitoring the Atlantic Inflow toward the Arctic (MAIA)

The overall objective of MAIA is to develop an inexpensive, reliable system based on coastal sea-level data for monitoring the inflows of Atlantic Water to the northern seas. Available observation systems, including stan-dard tidal stations, will be used to obtain transport estimates with a time resolution of less than a week and show that the method is generic and can be applied to a similar monitoring of other regions.

Long-range transport Climate Sea ice Ice Oceanography Arctic Ocean currents
122. Ice-sheet mass balance in central West Greenland

The aim of the project is to obtain more insight in the response of the Greenland ice sheet to climatic change. For this purpose we will link our surface energy-balance model to an atmospheric model, so that the model can be forced by variables characterizing the atmosphere outside the thermal influence of the ice sheet itself. The modelling is supported by the mass-balance and meteorological data that we collect along a transect in West Greenland (the Kangerlussuaq-transect or K-transect). The albedo of the ice sheet is studied by means of satellite data and measurements obtained from a helicopter. Research activities - develop numerical models of the surface energy balance and the boundary layer above the ice sheet - perform annual measurements of the mass balance and ice velocity along the K-transect - maintain two automatic weather stations along the K-transect - study the surface albedo by means of remote-sensing images - improve methods to retrieve the surface albedo from satellite data by means of measurements obtained from a helicopter

mass balance Geophysics Climate variability Climate meteorology surface albedo Climate change Ice Ice sheets
123. The response of arctic glaciers to climate change

Land ice forms an important component of the climate system. Sea level variations are closely related to the total ice volume. However, the relation between glacier mass balance and meteorological conditions is inderstood only broadly. In particular, the strong variation of mass balance patterns on the 10-300 km scale has hardly been investigated. Reduction of the uncertainty in estimating changes in glacier mass balance for climate change scenario's requires a better knowledge of the processes that lead to the spatial variability of glacier mass balance. The goal of the project is to indentify and model the most important factors leading to mesoscale variability of the mass balance field on ice caps.

Glaciers mass balance Climate Climate change
124. Polar Exchange at the Sea Surface (POLES)

Our broad area of enquiry is the role of polar regions in the global energy and water cycles, and the atmospheric, oceanic and sea ice processes that determine that role. The primary importance of our investigation is to show how these polar processes relate to global climate.

Atmospheric processes polar cloud dynamics ice dynamics surface radiation and cloud forcing Climate variability Climate Sea ice Climate change surface heat and mass balance polar atmospheric processes ice-ocean models arctic climate Modelling Ice Oceanography Arctic SEARCH Atmosphere Ocean currents cryosphere ice thickness
125. The Role of Polar Oceans in Contemporary Climate Change

Our central geophysical objective is to determine how sea ice and the polar oceans respond to and influence the large-scale circulation of the atmosphere. Our primary technical objective is to determine how best to incorporate satellite measurements in an ice/ocean model.

Atmospheric processes ice dynamics mass balance of Arctic sea ice Geophysics Climate variability Climate Sea ice Climate change freshwater balance of the Arctic Ocean polar atmospheric processes ice-ocean models arctic climate Modelling Ice Oceanography Arctic SEARCH Atmosphere Ocean currents ice thickness
126. A 30-Year Sea Ice Data Set from Satellite Microwave Radiometers

The project consists of two parts: the generation of a data set of sea ice extents and areas, and associated scientific analyses. The objective of the first part is to produce a 30-year, research quality sea ice data set for climate change studies. The data set will build on an existing 18-year data set derived from satellite passive-microwave observations and currently archived at the National Snow and Ice Data Center in Boulder, CO. We will extend this data set by using historical data from the 1970's from the National Ice Center and new data from DMSP Special Sensor Microwave Imagers and the upcoming EOS-PM Advanced Microwave Scanning Radiometer. These data sets will be cross-calibrated to ensure a consistent 30-year data set following methods developed earlier and based on matching the geophysical parameters during periods of sensor overlap. The principal products will be Arctic and Antarctic sea ice extents and areas, derived from sea ice concentration maps. The second part of the proposal will center on the analysis and use of the 30-year data set. The science objectives are (1) to define and explain the hemispheric, regional, seasonal, and interannual variabilities and trends of the Arctic and Antarctic sea ice covers and (2) to understand any observed hemispheric asymmetries in global sea ice changes. Hemispheric sea ice cover asymmetries have been found in the existing 18-year record and have also been suggested from some model experiments simulating future conditions assuming a gradual increase in atmospheric CO2. We will examine the proposed 30-year record to determine the degree and nature of the hemispheric asymmetry in it and to place the sea ice observations in the context of other climate variables through comparisons with simulations from the NOAA Geophysical Fluid Dynamics Laboratory and Hadley Centre climate models.

Climate variability Climate Sea ice Arctic SEARCH
127. International Arctic Buoy Program

To regularly deploy buoys in the Arctic to measure atmospheric temperature and pressure at various drifting sites.

Atmospheric processes Climate Arctic SEARCH Atmosphere
128. Swedish Regional Climate Modelling Programme (SWECLIM)

It has become clear in recent years that a changing composition of the atmosphere due to human activities may influence the climate system. The production of greenhouse gases and their accumulation in the atmosphere can result in a global warming and changes in the climate system. On regional scales, this may result in even much more pronounced changes. This is particularly true for the high northern latitudes. Climate changes will impact the society and nature in many ways. The anticipated effects are large and will matter both globally (mainly negative consequences) and regionally (both negative and positive consequences). SWECLIM provides users with detailed regional climate study results. SWECLIM develops regional (limited area) climate system modeling, studies climate processes and feedback special for the Nordic region and creates regional climate (change) scenarios on a time scale of 50-100 years. SWECLIM also performs impact studies on water resources. Climate scenarios are also made available for other impact studies, such as in forestry, done by external groups. Information activities on climate change and the regional consequences are an important component in the program. The regional climate model system is built around a regional atmospheric model, regional ocean models with sea ice for the Baltic Sea and land surface modeling plus hydrology. The model system is forced at the by large-scale results from global climate models. Multi-year to multi-decade length integrations are performed with the regional model targeting a domain roughly centered on the Nordic countries and using horizontal resolutions ranging from 20-80 km.

Atmospheric processes Climate variability Climate Sea ice Climate change Atmosphere Temporal trends
129. Atmospheric Radiation Measurement (ARM) Program

The North Slope of Alaska/Adjacent Arctic Ocean Cloud and Radiation Testbed (CART) site is providing data about cloud and radiative processes at high latitudes. These data are being used to refine models and parameterizations as they relate to the Arctic. The NSA/AAO site is centered at Barrow and extends to the south (to the vicinity of Atqasuk), west (to the vicinity of Wainwright), and east (perhaps to Oliktok). The Adjacent Arctic Ocean was probed by the Surface Heat Budget of the Arctic (SHEBA) experiment, a multi-agency program led by the National Science Foundation and the Office of Naval Research. SHEBA involved the deployment of an instrumented ice camp within the perennial Arctic Ocean ice pack that began in October 1997 and lasted for 12 monthsB. For the planning period covered here, a major focus will be on completing the facilities at Atqasuk, 100 km inland from Barrow. Presently, the instrumentation shelters are located on a gravel pad turn-around at the end of a dead end road between the town of Atqasuk and its airport. To comply with the terms of our land lease, we will construct a platform on pilings adjacent to the gravel pad and move the shelters off the roadway and onto the platform. The platform will permit long-term deployment of the Atqasuk instrumentation in a manner very similar to that at Barrow. Sky radiation (SKYRAD) radiometric instrumentation will be mounted above the level of the roof of the shelters so as to avoid shadowing, and the ground radiation (GNDRAD) instrumentation will be mounted on a tip tower such as the one about to be installed at Barrow. At Atqasuk, during the CY 2000 melt season, the science team heat flux study begun during the CY 1999 melt season will resume in spring with the redeployment of a laser scintillometer. In addition, heat flux measurements will begin near Barrow on the shore of the Beaufort Sea in the same time frame. Also at Barrow, a mini-IOP is planned during spring 2000 that will bring together two extended-range atmospheric emitted radiance interferometers (ER-AERIs) (including the one permanently installed at Barrow), one normal range downward-looking AERI (for snow characterization), and one or two other extended-range upward-looking Fourier transform infrared spectrometers (FTIRs). Various other less major enhancements will be made to the instrumentation suites of both Barrow and Atqasuk. Both facilities, however, will continue to be strongly focused on Instantaneous Radiative Flux (IRF) experiments for this planning period. A Single-Column Model (SCM) experiment utilizing either subscale or full scale aircraft that had been proposed for the NSA/AAO for CY2000 will be put off for a year.

Climate variability Climate Climate change SEARCH