Now showing items 11-20 of 122
Surface Atmospheric Temperature as Indicator of Climate Change in the Arctic
(Nansen Environmental and Remote Sensing Center, 2005-12)
Surface atmospheric temperature (SAT) is one of the most reliable atmospheric characteristics used to quantify climate change. Contrary to what has been always implicitly assumed, changes in the SAT have loose relations ...
Open Boundary Conditions for the Extended Kalman Filter With a Quasi-Geostrophic Ocean Model
(American Geophysical Union, 1993-05-18)
The formulation of consistent boundary conditions for the quasi-geostrophic (QG) model with an extended Kaiman filter in a data assimilation scheme is discussed. To form a well-posed boundary value problem for the QG model, ...
The sensitivity of the present day Atlantic meriodinal overturning circulation to freshwater forcing
(American Geophysical Union, 2003-09-09)
Mounting evidence indicates that the Atlantic Meridional Overturning Circulation (AMOC) was strongly reduced during cold climate episodes in the past, possible due to freshwater influx from glacial melting. It is also ...
Subpolar Gyre Index and the North Atlantic Meridional Overturning Circulation in a Coupled Climate Model
(Institute of Atmospheric Physics, Chinese Academy of Sciences, 2008-11-16)
The subpolar gyre index (SPG), derived from the analysis of sea surface height (SSH), is proposed to be a potential indicator for the North Atlantic Meridional Overturning Circulation (AMOC) based on observation as well ...
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 ...
A Possible Feedback Mechanism Involving the Arctic Freshwater, the Arctic Sea Ice, and the North Atlantic Drift
(Science Press, 2004-03-15)
Model studies point to enhanced warming and to increased freshwater fluxes to high northern latitudes in response to global warming. In order to address possible feedbacks in the ice-ocean system in response to such ...
Evaluating Global Ocean Carbon Models: The Importance of Realistic Physics
(American Geophysical Union, 2004-09-15)
A suite of standard ocean hydrographic and circulation metrics are applied to the equilibrium physical solutions from 13 global carbon models participating in phase 2 of the Ocean Carbon-cycle Model Intercomparison Project ...
Heat and Mass Transfer Laws for Turbulent Convective Flows in the Atmosphere over Leads in Ice Covered Oceans, C32A-1123, American Geophysical Union (AGU) Fall Meeting, 5-9 December, San-Francisco, USA
(Nansen Environmental and Remote Sensing Center, 2005)
Patches of open water (cracks, leads and polynias, Figure 1) in theice cover give major contributions to turbulent exchanges of heat, moisture, CO2 and other gases between the atmosphere and Polar oceans. Here, convective ...
Arctic sea ice and climate change - will the sea ice disappear in this century?
(Blackwell Scientific Publications, 2000)