Variability of Indian summer monsoon in a new upper tropospheric humidity data set

Prince K. Xavier, Viju O. John, S. A. Buehler, Ajaya Ravindran, S. Sijikumar

    Research output: Contribution to journalArticle

    Abstract

    Using a new data set we demonstrate the variability of upper troposphere humidity (UTH) associated with the Indian Summer Monsoon (ISM). The main advantage of the new data set is its all-sky representation which is essential to capture the full variability of humidity even in cloudy areas. We show that UTH undergoes significant variations during the active/break phases of the monsoon and discuss the mechanisms. The interannual variations of monsoon are also well reflected in the UTH. A preliminary investigation into the cause of the 2009 monsoon failure reveals anomalous subsidence and suppressed convection over the monsoon region due to anomalous warm conditions in the equatorial Pacific throughout the summer. The large scale drying of the upper troposphere may also have contributed to a negative feedback in suppressing convection.

    Original languageEnglish (US)
    Article numberL05705
    JournalGeophysical Research Letters
    Volume37
    Issue number5
    DOIs
    StatePublished - Mar 1 2010

    Fingerprint

    monsoons
    summer
    humidity
    troposphere
    monsoon
    convection
    negative feedback
    subsidence
    annual variations
    drying
    annual variation
    sky
    causes

    ASJC Scopus subject areas

    • Earth and Planetary Sciences(all)
    • Geophysics

    Cite this

    Xavier, P. K., John, V. O., Buehler, S. A., Ravindran, A., & Sijikumar, S. (2010). Variability of Indian summer monsoon in a new upper tropospheric humidity data set. Geophysical Research Letters, 37(5), [L05705]. https://doi.org/10.1029/2009GL041861

    Variability of Indian summer monsoon in a new upper tropospheric humidity data set. / Xavier, Prince K.; John, Viju O.; Buehler, S. A.; Ravindran, Ajaya; Sijikumar, S.

    In: Geophysical Research Letters, Vol. 37, No. 5, L05705, 01.03.2010.

    Research output: Contribution to journalArticle

    Xavier, PK, John, VO, Buehler, SA, Ravindran, A & Sijikumar, S 2010, 'Variability of Indian summer monsoon in a new upper tropospheric humidity data set', Geophysical Research Letters, vol. 37, no. 5, L05705. https://doi.org/10.1029/2009GL041861
    Xavier, Prince K. ; John, Viju O. ; Buehler, S. A. ; Ravindran, Ajaya ; Sijikumar, S. / Variability of Indian summer monsoon in a new upper tropospheric humidity data set. In: Geophysical Research Letters. 2010 ; Vol. 37, No. 5.
    @article{9324f92eec7b434bbc14193a922bab80,
    title = "Variability of Indian summer monsoon in a new upper tropospheric humidity data set",
    abstract = "Using a new data set we demonstrate the variability of upper troposphere humidity (UTH) associated with the Indian Summer Monsoon (ISM). The main advantage of the new data set is its all-sky representation which is essential to capture the full variability of humidity even in cloudy areas. We show that UTH undergoes significant variations during the active/break phases of the monsoon and discuss the mechanisms. The interannual variations of monsoon are also well reflected in the UTH. A preliminary investigation into the cause of the 2009 monsoon failure reveals anomalous subsidence and suppressed convection over the monsoon region due to anomalous warm conditions in the equatorial Pacific throughout the summer. The large scale drying of the upper troposphere may also have contributed to a negative feedback in suppressing convection.",
    author = "Xavier, {Prince K.} and John, {Viju O.} and Buehler, {S. A.} and Ajaya Ravindran and S. Sijikumar",
    year = "2010",
    month = "3",
    day = "1",
    doi = "10.1029/2009GL041861",
    language = "English (US)",
    volume = "37",
    journal = "Geophysical Research Letters",
    issn = "0094-8276",
    publisher = "American Geophysical Union",
    number = "5",

    }

    TY - JOUR

    T1 - Variability of Indian summer monsoon in a new upper tropospheric humidity data set

    AU - Xavier, Prince K.

    AU - John, Viju O.

    AU - Buehler, S. A.

    AU - Ravindran, Ajaya

    AU - Sijikumar, S.

    PY - 2010/3/1

    Y1 - 2010/3/1

    N2 - Using a new data set we demonstrate the variability of upper troposphere humidity (UTH) associated with the Indian Summer Monsoon (ISM). The main advantage of the new data set is its all-sky representation which is essential to capture the full variability of humidity even in cloudy areas. We show that UTH undergoes significant variations during the active/break phases of the monsoon and discuss the mechanisms. The interannual variations of monsoon are also well reflected in the UTH. A preliminary investigation into the cause of the 2009 monsoon failure reveals anomalous subsidence and suppressed convection over the monsoon region due to anomalous warm conditions in the equatorial Pacific throughout the summer. The large scale drying of the upper troposphere may also have contributed to a negative feedback in suppressing convection.

    AB - Using a new data set we demonstrate the variability of upper troposphere humidity (UTH) associated with the Indian Summer Monsoon (ISM). The main advantage of the new data set is its all-sky representation which is essential to capture the full variability of humidity even in cloudy areas. We show that UTH undergoes significant variations during the active/break phases of the monsoon and discuss the mechanisms. The interannual variations of monsoon are also well reflected in the UTH. A preliminary investigation into the cause of the 2009 monsoon failure reveals anomalous subsidence and suppressed convection over the monsoon region due to anomalous warm conditions in the equatorial Pacific throughout the summer. The large scale drying of the upper troposphere may also have contributed to a negative feedback in suppressing convection.

    UR - http://www.scopus.com/inward/record.url?scp=77949288620&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=77949288620&partnerID=8YFLogxK

    U2 - 10.1029/2009GL041861

    DO - 10.1029/2009GL041861

    M3 - Article

    VL - 37

    JO - Geophysical Research Letters

    JF - Geophysical Research Letters

    SN - 0094-8276

    IS - 5

    M1 - L05705

    ER -