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Seasonal and elevational contrasts in temperature trends in Central Chile between 1979 and 2015.

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Title: Seasonal and elevational contrasts in temperature trends in Central Chile between 1979 and 2015.
Authors: Burger, F.1 flavia.burger@northumbria.ac.uk, Brock, B.1 benjamin.brock@northumbria.ac.uk, Montecinos, A.2 amonteci@dgeo.udec.cl
Source: Global & Planetary Change. Mar2018, Vol. 162, p136-147. 12p.
Subjects: Seasonal temperature variations, Troposphere, Coastal archaeology, Radiosondes, Mountain environmental conditions
Geographic Terms: Andes
Abstract: We analyze trends in temperature from 18 temperature stations and one upper air sounding site at 30°–35° S in central Chile between 1979–2015, to explore geographical and season temperature trends and their controls, using regional ocean-atmosphere indices. Significant warming trends are widespread at inland stations, while trends are non-significant or negative at coastal sites, as found in previous studies. However, ubiquitous warming across the region in the past 8 years, suggests the recent period of coastal cooling has ended. Significant warming trends are largely restricted to austral spring, summer and autumn seasons, with very few significant positive or negative trends in winter identified. Autumn warming is notably strong in the Andes, which, together with significant warming in spring, could help to explain the negative mass balance of snow and glaciers in the region. A strong Pacific maritime influence on regional temperature trends is inferred through correlation with the Interdecadal Pacific Oscillation (IPO) index and coastal sea surface temperature, but the strength of this influence rapidly diminishes inland, and the majority of valley, and all Andes, sites are independent of the IPO index. Instead, valley and Andes sites, and mid-troposphere temperature in the coastal radiosonde profile, show correlation with the autumn Antarctic Oscillation which, in its current positive phase, promotes subsidence and warming at the latitude of central Chile. [ABSTRACT FROM AUTHOR]
Copyright of Global & Planetary Change is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 128164244
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Seasonal and elevational contrasts in temperature trends in Central Chile between 1979 and 2015.
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  Data: <searchLink fieldCode="AR" term="%22Burger%2C+F%2E%22">Burger, F.</searchLink><relatesTo>1</relatesTo><i> flavia.burger@northumbria.ac.uk</i><br /><searchLink fieldCode="AR" term="%22Brock%2C+B%2E%22">Brock, B.</searchLink><relatesTo>1</relatesTo><i> benjamin.brock@northumbria.ac.uk</i><br /><searchLink fieldCode="AR" term="%22Montecinos%2C+A%2E%22">Montecinos, A.</searchLink><relatesTo>2</relatesTo><i> amonteci@dgeo.udec.cl</i>
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  Data: <searchLink fieldCode="DE" term="%22Seasonal+temperature+variations%22">Seasonal temperature variations</searchLink><br /><searchLink fieldCode="DE" term="%22Troposphere%22">Troposphere</searchLink><br /><searchLink fieldCode="DE" term="%22Coastal+archaeology%22">Coastal archaeology</searchLink><br /><searchLink fieldCode="DE" term="%22Radiosondes%22">Radiosondes</searchLink><br /><searchLink fieldCode="DE" term="%22Mountain+environmental+conditions%22">Mountain environmental conditions</searchLink>
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  Label: Abstract
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  Data: We analyze trends in temperature from 18 temperature stations and one upper air sounding site at 30°–35° S in central Chile between 1979–2015, to explore geographical and season temperature trends and their controls, using regional ocean-atmosphere indices. Significant warming trends are widespread at inland stations, while trends are non-significant or negative at coastal sites, as found in previous studies. However, ubiquitous warming across the region in the past 8 years, suggests the recent period of coastal cooling has ended. Significant warming trends are largely restricted to austral spring, summer and autumn seasons, with very few significant positive or negative trends in winter identified. Autumn warming is notably strong in the Andes, which, together with significant warming in spring, could help to explain the negative mass balance of snow and glaciers in the region. A strong Pacific maritime influence on regional temperature trends is inferred through correlation with the Interdecadal Pacific Oscillation (IPO) index and coastal sea surface temperature, but the strength of this influence rapidly diminishes inland, and the majority of valley, and all Andes, sites are independent of the IPO index. Instead, valley and Andes sites, and mid-troposphere temperature in the coastal radiosonde profile, show correlation with the autumn Antarctic Oscillation which, in its current positive phase, promotes subsidence and warming at the latitude of central Chile. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Global & Planetary Change is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.gloplacha.2018.01.005
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      – Code: eng
        Text: English
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        PageCount: 12
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      – SubjectFull: Seasonal temperature variations
        Type: general
      – SubjectFull: Troposphere
        Type: general
      – SubjectFull: Coastal archaeology
        Type: general
      – SubjectFull: Radiosondes
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      – SubjectFull: Mountain environmental conditions
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      – SubjectFull: Andes
        Type: general
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      – TitleFull: Seasonal and elevational contrasts in temperature trends in Central Chile between 1979 and 2015.
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            NameFull: Burger, F.
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            NameFull: Brock, B.
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              Text: Mar2018
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