OCEAN VARIABILITY IN CMIP5 (COUPLED MODEL INTERCOMPARISON PROJECT PHASE 5) HISTORICAL SIMULATIONS

The oceans play a key role in the global climate variability. This dissertation examines climate variability in historical simulations from fourteen CMIP5 (Coupled Model Intercomparison Project Phase 5) coupled models on different time scales. Responses of oceans to the external volcanic eruption, g...

Full description

Bibliographic Details
Main Author: Ding, Yanni
Other Authors: Carton, James A., Digital Repository at the University of Maryland, University of Maryland (College Park, Md.), Atmospheric and Oceanic Sciences
Format: Doctoral or Postdoctoral Thesis
Language:English
Published: 2014
Subjects:
Online Access:http://hdl.handle.net/1903/16284
https://doi.org/10.13016/M22G84
id ftunivmaryland:oai:drum.lib.umd.edu:1903/16284
record_format openpolar
spelling ftunivmaryland:oai:drum.lib.umd.edu:1903/16284 2023-05-15T14:56:54+02:00 OCEAN VARIABILITY IN CMIP5 (COUPLED MODEL INTERCOMPARISON PROJECT PHASE 5) HISTORICAL SIMULATIONS Ding, Yanni Carton, James A. Digital Repository at the University of Maryland University of Maryland (College Park, Md.) Atmospheric and Oceanic Sciences 2014 application/pdf http://hdl.handle.net/1903/16284 https://doi.org/10.13016/M22G84 en eng doi:10.13016/M22G84 http://hdl.handle.net/1903/16284 Physical oceanography Dissertation 2014 ftunivmaryland https://doi.org/10.13016/M22G84 2022-11-11T11:15:55Z The oceans play a key role in the global climate variability. This dissertation examines climate variability in historical simulations from fourteen CMIP5 (Coupled Model Intercomparison Project Phase 5) coupled models on different time scales. Responses of oceans to the external volcanic eruption, green house gas forcing, and internally generated variability are investigated with emphasis on higher latitudes. Chapter 2 addresses the oceanic response to tropical volcanic eruptions. Previous modeling studies have provided conflicting high latitude climate responses to volcanic eruptions, including the ocean's role. This controversy happens mainly because the response varies widely from model to model, and even varies among ensemble members of a single model. The increase in Atlantic Meridional Overturning Circulation (AMOC) after the volcanic eruption is closely linked with its internal variability. Chapter 3 addresses the seasonal and centennial trends in the Arctic Ocean. The Arctic warming is apparent in all models, although there is considerable variability especially its seasonal cycle. Both the surface heat flux and the oceanic heat convergence contribute to the Arctic warming on centennial time scale. Meanwhile, the seasonal variation of oceanic warming is largely determined by the atmospheric heating. In models presenting a clear seasonal cycle of surface net flux increases, there is a notable retreat of sea ice extent in winter, which allows more heat loss from the ocean through turbulent fluxes. Chapter 4 discusses the internally generated variability of high latitude water masses. Both the magnitude and the time scale of subarctic decadal variability are strikingly similar to observations. The analysis of the more realistic models provides constraints on relative roles of the oceanic heat transport and the atmospheric heat flux. One possible factor that could give rise to the different origins of ocean variability is the blocking of mid-latitude jet stream. The oceanic heat transport is more important ... Doctoral or Postdoctoral Thesis Arctic Arctic Ocean Sea ice Subarctic University of Maryland: Digital Repository (DRUM) Arctic Arctic Ocean
institution Open Polar
collection University of Maryland: Digital Repository (DRUM)
op_collection_id ftunivmaryland
language English
topic Physical oceanography
spellingShingle Physical oceanography
Ding, Yanni
OCEAN VARIABILITY IN CMIP5 (COUPLED MODEL INTERCOMPARISON PROJECT PHASE 5) HISTORICAL SIMULATIONS
topic_facet Physical oceanography
description The oceans play a key role in the global climate variability. This dissertation examines climate variability in historical simulations from fourteen CMIP5 (Coupled Model Intercomparison Project Phase 5) coupled models on different time scales. Responses of oceans to the external volcanic eruption, green house gas forcing, and internally generated variability are investigated with emphasis on higher latitudes. Chapter 2 addresses the oceanic response to tropical volcanic eruptions. Previous modeling studies have provided conflicting high latitude climate responses to volcanic eruptions, including the ocean's role. This controversy happens mainly because the response varies widely from model to model, and even varies among ensemble members of a single model. The increase in Atlantic Meridional Overturning Circulation (AMOC) after the volcanic eruption is closely linked with its internal variability. Chapter 3 addresses the seasonal and centennial trends in the Arctic Ocean. The Arctic warming is apparent in all models, although there is considerable variability especially its seasonal cycle. Both the surface heat flux and the oceanic heat convergence contribute to the Arctic warming on centennial time scale. Meanwhile, the seasonal variation of oceanic warming is largely determined by the atmospheric heating. In models presenting a clear seasonal cycle of surface net flux increases, there is a notable retreat of sea ice extent in winter, which allows more heat loss from the ocean through turbulent fluxes. Chapter 4 discusses the internally generated variability of high latitude water masses. Both the magnitude and the time scale of subarctic decadal variability are strikingly similar to observations. The analysis of the more realistic models provides constraints on relative roles of the oceanic heat transport and the atmospheric heat flux. One possible factor that could give rise to the different origins of ocean variability is the blocking of mid-latitude jet stream. The oceanic heat transport is more important ...
author2 Carton, James A.
Digital Repository at the University of Maryland
University of Maryland (College Park, Md.)
Atmospheric and Oceanic Sciences
format Doctoral or Postdoctoral Thesis
author Ding, Yanni
author_facet Ding, Yanni
author_sort Ding, Yanni
title OCEAN VARIABILITY IN CMIP5 (COUPLED MODEL INTERCOMPARISON PROJECT PHASE 5) HISTORICAL SIMULATIONS
title_short OCEAN VARIABILITY IN CMIP5 (COUPLED MODEL INTERCOMPARISON PROJECT PHASE 5) HISTORICAL SIMULATIONS
title_full OCEAN VARIABILITY IN CMIP5 (COUPLED MODEL INTERCOMPARISON PROJECT PHASE 5) HISTORICAL SIMULATIONS
title_fullStr OCEAN VARIABILITY IN CMIP5 (COUPLED MODEL INTERCOMPARISON PROJECT PHASE 5) HISTORICAL SIMULATIONS
title_full_unstemmed OCEAN VARIABILITY IN CMIP5 (COUPLED MODEL INTERCOMPARISON PROJECT PHASE 5) HISTORICAL SIMULATIONS
title_sort ocean variability in cmip5 (coupled model intercomparison project phase 5) historical simulations
publishDate 2014
url http://hdl.handle.net/1903/16284
https://doi.org/10.13016/M22G84
geographic Arctic
Arctic Ocean
geographic_facet Arctic
Arctic Ocean
genre Arctic
Arctic Ocean
Sea ice
Subarctic
genre_facet Arctic
Arctic Ocean
Sea ice
Subarctic
op_relation doi:10.13016/M22G84
http://hdl.handle.net/1903/16284
op_doi https://doi.org/10.13016/M22G84
_version_ 1766328948594049024