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Digitale Medien

Global change Monsoon linkages (2003)

Zahn, Rainer

[s.l.] : Nature Publishing Group

Nature 421 (2003), S. 324-325

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] The monsoon is the main determinant of environmental conditions over much of Asia, and so affects the most densely populated region on Earth. Differential heating of the north Indian Ocean and the northwest Pacific, and of the Asian land-mass, cause the seasonal reversal of monsoon winds. In ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/421324a

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Global change: Monsoon linkages (2003)

Zahn, Rainer

Nature Publishing Group

In: Nature, 421 (6921). pp. 324-325.

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Publikationsdatum: 2016-07-19

Beschreibung: An excellent sediment record from the Arabian Sea traces recent patterns in the activity of the Asian monsoon. It reveals both variability in monsoon strength and links with climatic events elsewhere. The monsoon is the main determinant of environmental conditions over much of Asia, and so affects the most densely populated region on Earth. Differential heating of the north Indian Ocean and the northwest Pacific, and of the Asian land-mass, cause the seasonal reversal of monsoon winds. In summer, these winds blow northwards over the northern Indian Ocean, carrying huge amounts of moisture over the neighbouring land. The ensuing heavy rainfall can have devastating consequences for human life and livelihood. Conversely, agriculture in Asia depends on monsoon rains; and the seasonal upwelling of nutrient-laden subsurface waters, driven by monsoon winds, is essential to the success of coastal fisheries.

Materialart: Article , PeerReviewed

Format: text

DOI: 10.1038/421324a

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Ocean currents generate large footprints in marine palaeoclimate proxies (2015)

van Sebille, Erik ; Scussolini, Paolo ; Durgadoo, Jonathan V. ; [weitere]

Nature Publishing Group

In: Nature Communications, 6 (6521).

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Publikationsdatum: 2019-02-25

Beschreibung: Fossils of marine microorganisms such as planktic foraminifera are among the cornerstones of palaeoclimatological studies. It is often assumed that the proxies derived from their shells represent ocean conditions above the location where they were deposited. Planktic foraminifera, however, are carried by ocean currents and, depending on the life traits of the species, potentially incorporate distant ocean conditions. Here we use high-resolution ocean models to assess the footprint of planktic foraminifera and validate our method with proxy analyses from two locations. Results show that foraminifera, and thus recorded palaeoclimatic conditions, may originate from areas up to several thousands of kilometres away, reflecting an ocean state significantly different from the core site. In the eastern equatorial regions and the western boundary current extensions, the offset may reach 1.5 °C for species living for a month and 3.0 °C for longer-living species. Oceanic transport hence appears to be a crucial aspect in the interpretation of proxy signals.

Materialart: Article , PeerReviewed

Format: text

DOI: 10.1038/ncomms7521

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