The Adequacy of Observing Systems in Monitoring the Atlantic Meridional Overturning Circulation and North Atlantic Climate
The Atlantic meridional overturning circulation (AMOC) has an important influence on climate, and yet adequate observations of this circulation are lacking. Here, the authors assess the adequacy of past and current widely deployed routine observing systems for monitoring the AMOC and associated Nort...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.190.5627 2023-05-15T17:06:10+02:00 The Adequacy of Observing Systems in Monitoring the Atlantic Meridional Overturning Circulation and North Atlantic Climate S. Zhang A. Rosati T. Delworth The Pennsylvania State University CiteSeerX Archives 2010 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.190.5627 http://www.gfdl.gov/bibliography/related_files/sqz1002.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.190.5627 http://www.gfdl.gov/bibliography/related_files/sqz1002.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.gfdl.gov/bibliography/related_files/sqz1002.pdf text 2010 ftciteseerx 2016-01-07T16:53:52Z The Atlantic meridional overturning circulation (AMOC) has an important influence on climate, and yet adequate observations of this circulation are lacking. Here, the authors assess the adequacy of past and current widely deployed routine observing systems for monitoring the AMOC and associated North Atlantic climate. To do so, this study draws on two independent simulations of the twentieth century using an Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4) coupled climate model. One simulation is treated as ‘‘truth’ ’ and is sampled according to the observing system being evaluated. The authors then assimilate these synthetic ‘‘observations’ ’ into the second simulation within a fully coupled system that instantaneously exchanges information among all coupled components and produces a nearly balanced and coherent estimate for global climate states including the North Atlantic climate system. The degree to which the assimilation recovers the truth is an assessment of the adequacy of the observing system being evaluated. As the coupled system responds to the constraint of the atmosphere or ocean, the assessment of the recovery for climate quantities such as Labrador Sea Water (LSW) and the North Atlantic Oscillation increases the understanding of the factors that determine AMOC variability. For example, the low-frequency sea surface forcings provided by the atmospheric and sea surface temperature observations are found to excite Text Labrador Sea North Atlantic North Atlantic oscillation Unknown |
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English |
description |
The Atlantic meridional overturning circulation (AMOC) has an important influence on climate, and yet adequate observations of this circulation are lacking. Here, the authors assess the adequacy of past and current widely deployed routine observing systems for monitoring the AMOC and associated North Atlantic climate. To do so, this study draws on two independent simulations of the twentieth century using an Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4) coupled climate model. One simulation is treated as ‘‘truth’ ’ and is sampled according to the observing system being evaluated. The authors then assimilate these synthetic ‘‘observations’ ’ into the second simulation within a fully coupled system that instantaneously exchanges information among all coupled components and produces a nearly balanced and coherent estimate for global climate states including the North Atlantic climate system. The degree to which the assimilation recovers the truth is an assessment of the adequacy of the observing system being evaluated. As the coupled system responds to the constraint of the atmosphere or ocean, the assessment of the recovery for climate quantities such as Labrador Sea Water (LSW) and the North Atlantic Oscillation increases the understanding of the factors that determine AMOC variability. For example, the low-frequency sea surface forcings provided by the atmospheric and sea surface temperature observations are found to excite |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
S. Zhang A. Rosati T. Delworth |
spellingShingle |
S. Zhang A. Rosati T. Delworth The Adequacy of Observing Systems in Monitoring the Atlantic Meridional Overturning Circulation and North Atlantic Climate |
author_facet |
S. Zhang A. Rosati T. Delworth |
author_sort |
S. Zhang |
title |
The Adequacy of Observing Systems in Monitoring the Atlantic Meridional Overturning Circulation and North Atlantic Climate |
title_short |
The Adequacy of Observing Systems in Monitoring the Atlantic Meridional Overturning Circulation and North Atlantic Climate |
title_full |
The Adequacy of Observing Systems in Monitoring the Atlantic Meridional Overturning Circulation and North Atlantic Climate |
title_fullStr |
The Adequacy of Observing Systems in Monitoring the Atlantic Meridional Overturning Circulation and North Atlantic Climate |
title_full_unstemmed |
The Adequacy of Observing Systems in Monitoring the Atlantic Meridional Overturning Circulation and North Atlantic Climate |
title_sort |
adequacy of observing systems in monitoring the atlantic meridional overturning circulation and north atlantic climate |
publishDate |
2010 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.190.5627 http://www.gfdl.gov/bibliography/related_files/sqz1002.pdf |
genre |
Labrador Sea North Atlantic North Atlantic oscillation |
genre_facet |
Labrador Sea North Atlantic North Atlantic oscillation |
op_source |
http://www.gfdl.gov/bibliography/related_files/sqz1002.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.190.5627 http://www.gfdl.gov/bibliography/related_files/sqz1002.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766061192204255232 |