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  A relationship between ITCZ organization and subtropical humidity

Hohenegger, C., & Jakob, C. (2020). A relationship between ITCZ organization and subtropical humidity. Geophysical Research Letters, 47: e2020GL088515. doi:10.1029/2020GL088515.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-DC6B-B Version Permalink: http://hdl.handle.net/21.11116/0000-0006-EAB3-8
Genre: Journal Article

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2020GL088515.pdf (Publisher version), 2MB
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 Creators:
Hohenegger, Cathy1, Author              
Jakob, Christian2, Author
Affiliations:
1Precipitating Convection, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society, ou_3001851              
2external, ou_persistent22              

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Free keywords: Self-aggregation, Convection, Organization, Humidity, Climate
 Abstract: Motivated by the results of idealized studies on the self-aggregation of convection, we investigate a potential relationship between the degree of organization of the InterTropical Convergence Zone (ITCZ) and humidity based on reanalysis data. We focus on the Atlantic ITCZ and use the number of long convergence lines occurring per month to define the degree of organization. The latter shows a weak enhancement during June to August and a large interannual variability. On an interannual timescale and particularly during JJA, a relationship exists between organization and humidity: years with more organized ITCZs are associated with a moister ITCZ region and drier subtropics. Even though we cannot demonstrate any causality and cannot rule out the presence of another agent, we show that these moisture anomalies are not incompatible with an effect of organization. We also note that the annual cycle in SST gradient may contribute to the intraannual variability in organization.

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Language(s): eng - English
 Dates: 2020-042020-082020-082020-08-28
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1029/2020GL088515
 Degree: -

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Title: Geophysical Research Letters
  Abbreviation : GRL
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Geophysical Union / Wiley
Pages: - Volume / Issue: 47 Sequence Number: e2020GL088515 Start / End Page: - Identifier: ISSN: 0094-8276
CoNE: https://pure.mpg.de/cone/journals/resource/954925465217