umu.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
The East Asian Summer Monsoon: A comparison of present, Holocene and Eemian climate
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2014 (English)Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

The East Asian Summer Monsoon (EASM) is a major component in Asian climate. It is largely driven by climatic factors such as humidity, solar insolation and temperature. For at least 50 years the EASM has been studied extensively by scientists regarding its current strength. Models have been recreating past monsoon intensity as well as attempted to predict future intensity. As the monsoon undergoes changes, the climatic shifts responsible for them leave various traces behind; geochemical as well as biological, and these have been preserved and recorded in various locales on the planet. The most significant climatic change is the variation between glacial and interglacial periods which have been alternating for the last 2.6 million years and the EASM has changed in tune with the climate during this time. The EASM follows the δ18O-record in speleothems found in Eastern Asia as well as in ice cores from Greenland. Various geochemical and biological tracers seem to reflect these fluctuations in climate locally as well as globally over a 200 kyr period. The current intensity of the EASM seems to be one of decreasing strength, a phase that has persisted since the Holocene climatic optimum 8.5 kyr ago. Recently however a decrease in the East Asian Winter Monsoon has been confirmed, indicating an increase in EASM intensity. During the Holocene the EASM reached peak intensity during the Holocene climatic optimum but has fluctuated largely in tune with solar insolation. This is also true for the Eemian period although some events such as the mid-Eemian cooling show that factors other than solar insolation regulate monsoon intensity over large time periods. The future of the EASM seems to be one of increased strength due to climate change and models predict both increased wind speeds and an increasing occurrence of extreme precipitation despite decreasing solar insolation.

Place, publisher, year, edition, pages
2014. , 16 p.
Keyword [en]
East Asian Summer Monsoon, Eemian, Holocene, Climate
National Category
Climate Research
Identifiers
URN: urn:nbn:se:umu:diva-88062OAI: oai:DiVA.org:umu-88062DiVA: diva2:713362
Subject / course
Teoretisk Geoekologi
Educational program
Bachelor of Science in Biology and Earthscience
Presentation
2014-03-24, 09:00 (English)
Supervisors
Examiners
Available from: 2014-04-23 Created: 2014-04-22 Last updated: 2014-04-23Bibliographically approved

Open Access in DiVA

fulltext(1122 kB)323 downloads
File information
File name FULLTEXT01.pdfFile size 1122 kBChecksum SHA-512
495d514b4ac75a53805ff03e1d62c1ea76c730bbc57ce4d3fa1530af691aebce2a9643998c8a406a6c1ea56dace61dc45b943ddb942e26a59bc845a27f1ae953
Type fulltextMimetype application/pdf

By organisation
Department of Ecology and Environmental Sciences
Climate Research

Search outside of DiVA

GoogleGoogle Scholar
Total: 326 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 205 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf