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| Titel |
Decadal regime shift linkage between global marine fish landings and atmospheric planetary wave forcing |
| VerfasserIn |
A. M. Powell, J. Xu |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
2190-4979
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| Digitales Dokument |
URL |
| Erschienen |
In: Earth System Dynamics ; 6, no. 1 ; Nr. 6, no. 1 (2015-04-02), S.125-146 |
| Datensatznummer |
250115416
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| Publikation (Nr.) |
 copernicus.org/esd-6-125-2015.pdf |
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| Zusammenfassung |
| This investigation focuses on a global forcing mechanism for decadal regime
shifts and their subsequent impacts. The proposed global forcing mechanism
is that the global atmospheric planetary waves can lead to changes in the
global surface air–sea conditions and subsequently fishery changes. In this
study, the five decadal regime shifts (1956–1957, 1964–1965, 1977–1978, 1988–1989,
and 1998–1999) in the most recent 59-year period (1950–2008) have been identified based
on Student t tests and their association with global marine ecosystem change
has been discussed. Changes in the three major oceanic (Pacific, Atlantic,
and Indian) ecosystems will be explored with the goal of demonstrating the
linkage between stratospheric planetary waves and the ocean surface forcing
that leads to fisheries impacts. The
global forcing mechanism is described with a top-down approach to help the
multidisciplinary audience follow the analysis. Following previous work,
this analysis addresses how changes in the atmospheric planetary waves may
influence the vertical wind structure, surface wind stress, and their
connection with the global ocean ecosystems based on a coupling of the
atmospheric regime shifts with the decadal regime shifts determined from
marine life changes. The multiple decadal regime shifts related to changes
in marine life are discussed using the United Nations Food and Agriculture
Organization's (FAO) global fish capture data (catch/stock).
Analyses are performed to demonstrate that examining the interactions between the
atmosphere, ocean, and fisheries is a plausible approach to explaining
decadal climate change in the global marine ecosystems and its impacts. The
results show a consistent mechanism, ocean wind stress, responsible for
marine shifts in the three major ocean basins. Changes in the planetary wave
pattern affect the ocean wind stress patterns. A change in the ocean surface
wind pattern from longwave (relatively smooth and less complex) to shorter-wave (more convoluted and more complex) ocean surface wind stress creates
changes in global marine fisheries. |
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