Now showing items 31-40 of 122
Sea ice investigations in the Laptev Sea area in late summer using SAR data
(The Canadian Aeronautics and Space Institute, 2001-10)
The Laptev Sea area, including the Vilkitsky Strait, is an important part of the Northern Sea Route where the presence of sea ice makes navigation difficult even in the summer season. The objective of this study was therefore ...
Decreasing Arctic Sea Ice Mirrors Increasing CO2 on Decadal Time Scale
(Institute of Atmospheric Physics, Chinese Academy of Sciences, 2008-11-16)
Arctic sea ice is a keystone indicator of greenhouse-gas induced global climate change, which is expected to be amplified in the Arctic. Here we directly compare observed variations in arctic sea-ice extent and CO2 since ...
Observing the Ocean from Space: Emerging Capabilities in Europe
(GODAE Project Office and Bureau of Meteorology, Melbourne, 2001-12)
During the first decade of the 21st century Earth observation from satellites will be faced with two major demands: provision of continuity missions and launch of new exploratory missions. This paper addresses European ...
Direct ocean surface velocity measurements from space: Improved quantitative interpretation of Envisat ASAR observations
(American Geophysical Union, 2008-11-29)
Previous analysis of Advanced Synthetic Aperture Radar (ASAR) signals collected by ESA’s Envisat has demonstrated a very valuable source of high-resolution information, namely, the line-of-sight velocity of the moving ...
Measuring Ocean Salinity with ESA’s SMOS Mission – Advancing the Science
(European Space Agency, 2002-08)
Greenland Ice Sheet Elevation Ehange in Winter and Influence of Atmospheric Teleconnections in the Northern Hemisphere
(Institute of atmospheric physics, Chinese academy of sciences, Science press, 2009-11-16)
Magnitude and Origin of the Anthropogenic CO2 Increase and the 13C Suess Effect in the Nordic Seas since 1981
This study evaluates the anthropogenic changes of CO2 (∆Cant) and δ13C (∆δ13Cant) in the Nordic seas, the northern limb of the Atlantic Meridional Overturning Circulation, that took place between 1981 and 2002/03. The ...
Evaluation of ocean carbon cycle models with data-based metrics
(American Geophysical Union, 2004-04-02)
New radiocarbon and chlorofluorocarbon-11 data from the World Ocean Circulation Experiment are used to assess a suite of 19 ocean carbon cycle models. We use the distributions and inventories of these tracers as quantitative ...
Using the Extended Kalman Filter with a Multilayer Quasi-Geostrophic Ocean Model
(American Geophysical Union, 1992-11-15)
The formulation of the extended Kalman filter for a multilayer nonlinear quasi-geostrophic ocean circulation model is discussed. The nonlinearity in the ocean model leads to an approximative equation for error covariance ...
Validation and intercomparison studies within GODAE
(The Oceanography Society, 2009-09)
During the Global Ocean Data Assimilation Experiment (GODAE), seven international operational centers participated in a dedicated modeling system intercomparison exercise from February to April 2008. The objectives were: ...