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    Comments on “The South Indian Convergence Zone and Interannual Rainfall Variability over Southern Africa” and the Question of ENSO's Influence on Southern Africa

    Source: Journal of Climate:;2003:;volume( 016 ):;issue: 003::page 555
    Author:
    Nicholson, Sharon
    DOI: 10.1175/1520-0442(2003)016<0555:COTSIC>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Observational and modeling studies have produced extensive evidence of a link between rainfall variability in southern Africa and the Pacific ENSO phenomenon, as well as a link with sea surface temperatures in the Indian and, to a lesser extent, Atlantic Oceans. The consensus of various studies is that the direct cause of reduced rainfall in southern Africa, late in most ENSO events, is abnormally high SSTs in the oceans near Africa. These, in turn, are a response to ENSO. In contrast, the modeling study of Cook produces evidence that a direct link to ENSO is possible via a purely atmospheric response to the Pacific SST anomalies. In this note, this issue of direct versus indirect forcing is examined and Cook's model and its applicability to southern Africa are evaluated. Model output is shown to compare unfavorably with gauge-based climatologies and rainfall anomalies during ENSO events. This might account for the disagreement noted by Cook between her results and observational studies, as well as the disagreement between her results and those of other modeling experiments.
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      Comments on “The South Indian Convergence Zone and Interannual Rainfall Variability over Southern Africa” and the Question of ENSO's Influence on Southern Africa

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4203212
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    contributor authorNicholson, Sharon
    date accessioned2017-06-09T16:09:46Z
    date available2017-06-09T16:09:46Z
    date copyright2003/02/01
    date issued2003
    identifier issn0894-8755
    identifier otherams-6233.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4203212
    description abstractObservational and modeling studies have produced extensive evidence of a link between rainfall variability in southern Africa and the Pacific ENSO phenomenon, as well as a link with sea surface temperatures in the Indian and, to a lesser extent, Atlantic Oceans. The consensus of various studies is that the direct cause of reduced rainfall in southern Africa, late in most ENSO events, is abnormally high SSTs in the oceans near Africa. These, in turn, are a response to ENSO. In contrast, the modeling study of Cook produces evidence that a direct link to ENSO is possible via a purely atmospheric response to the Pacific SST anomalies. In this note, this issue of direct versus indirect forcing is examined and Cook's model and its applicability to southern Africa are evaluated. Model output is shown to compare unfavorably with gauge-based climatologies and rainfall anomalies during ENSO events. This might account for the disagreement noted by Cook between her results and observational studies, as well as the disagreement between her results and those of other modeling experiments.
    publisherAmerican Meteorological Society
    titleComments on “The South Indian Convergence Zone and Interannual Rainfall Variability over Southern Africa” and the Question of ENSO's Influence on Southern Africa
    typeJournal Paper
    journal volume16
    journal issue3
    journal titleJournal of Climate
    identifier doi10.1175/1520-0442(2003)016<0555:COTSIC>2.0.CO;2
    journal fristpage555
    journal lastpage562
    treeJournal of Climate:;2003:;volume( 016 ):;issue: 003
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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