The impact of aerosols on simulated ocean temperature and heat content in the 20th century

Details The impact of aerosols on simulated ocean temperature and heat content in the 20th century The impact of aerosols on simulated ocean temperature and heat content in the 20th century

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3224709d&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 24, CiteID L24709

Physics

24

Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801, 4906), Global Change: Global Climate Models (3337, 4928), Global Change: Oceans (1616, 3305, 4215, 4513), Global Change: Sea Level Change (1222, 1225, 4556), Oceanography: Physical: Decadal Ocean Variability (1616, 1635, 3305, 4215)

Scientific paper

Observational analyses have documented increases in global ocean temperature, heat content, and sea level in the 20th century. Previous studies argued that the observed ocean warming is a response to increasing greenhouse gases. We use a new climate model to decompose simulated ocean temperature changes into components attributable to subsets of anthropogenic and natural influences. The model simulates a positive trend in global ocean volume mean temperature from the mid 1950s to 2000, consistent with observational estimates. We show that for the period 1861-2000 aerosols have delayed the onset of ocean warming by several decades and reduced the magnitude of the transient warming by approximately two-thirds when compared to the response that arises solely from increasing greenhouse gases. The simulated cooling signature from large volcanic eruptions in the late 19th and early 20th centuries is clearly visible in the subsurface ocean well into the middle part of the 20th century.

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