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Title: Global warming-induced upper-ocean freshening and the intensification of super typhoons

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms13670· OSTI ID:1339813
 [1];  [2];  [1];  [3]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. NOAA, Miami, FL (United States)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Here, super typhoons (STYs), intense tropical cyclones of the western North Pacific, rank among the most destructive natural hazards globally. The violent winds of these storms induce deep mixing of the upper ocean, resulting in strong sea surface cooling and making STYs highly sensitive to ocean density stratification. Although a few studies examined the potential impacts of changes in ocean thermal structure on future tropical cyclones, they did not take into account changes in near-surface salinity. Here, using a combination of observations and coupled climate model simulations, we show that freshening of the upper ocean, caused by greater rainfall in places where typhoons form, tends to intensify STYs by reducing their ability to cool the upper ocean. We further demonstrate that the strengthening effect of this freshening over the period 1961–2008 is ~53% stronger than the suppressive effect of temperature, whereas under twenty-first century projections, the positive effect of salinity is about half of the negative effect of ocean temperature changes.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1339813
Report Number(s):
PNNL-SA-116242; KP1703010
Journal Information:
Nature Communications, Vol. 7; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 63 works
Citation information provided by
Web of Science

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Cited By (12)

Water budget and run-off response of a tropical multispecies “reforest” and effects of typhoon disturbance: Runoff response of a tropical ‘reforest’ journal November 2018
An appraisal of flood events using IMD, CRU, and CCSM4-derived meteorological data sets over the Vaigai river basin, Tamil Nadu (India) journal May 2019
Effects of Reforestation of a Degraded Imperata Grassland on Dominant Flow Pathways and Streamflow Responses in Leyte, the Philippines journal May 2019
The role of enhanced velocity shears in rapid ocean cooling during Super Typhoon Nepartak 2016 journal April 2019
Global warming hiatus contributed to the increased occurrence of intense tropical cyclones in the coastal regions along East Asia journal April 2018
The Tropical Atlantic Observing System journal May 2019
Satellite Salinity Observing System: Recent Discoveries and the Way Forward journal May 2019
Ocean Observations in Support of Studies and Forecasts of Tropical and Extratropical Cyclones journal July 2019
Numerical Investigation of Fresh and Salt Water Distribution in the Pearl River Estuary During a Typhoon Using a Fully Coupled Atmosphere-Wave-Ocean Model journal March 2019
Water budget and run-off response of a tropical multispecies “reforest” and effects of typhoon disturbance text January 2019
Effects of reforestation of a degraded Imperata grassland on dominant flow pathways and streamflow responses in Leyte, the Philippines text January 2019
A limited effect of sub-tropical typhoons on phytoplankton dynamics journal February 2021

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