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The effect of slope aspect on the response of snowpack to climate warming in the Pyrenees

Identifieur interne : 000993 ( PascalFrancis/Curation ); précédent : 000992; suivant : 000994

The effect of slope aspect on the response of snowpack to climate warming in the Pyrenees

Auteurs : J. I. Lopez-Moreno [Espagne] ; J. Revuelto [Espagne] ; M. Gilaberte [Espagne] ; E. Moran-Tejeda [Espagne] ; M. Pons [Andorre] ; E. Jover [Andorre] ; P. Esteban [Andorre] ; C. Garcia [Espagne] ; J. W. Pomeroy [Canada]

Source :

RBID : Pascal:14-0239501

Descripteurs français

English descriptors

Abstract

The aim of this study was to analyse the effect of slope aspect on the response of snowpack to climate warming in the Pyrenees. For this purpose, data available from five automatic weather stations were used to simulate the energy and mass balance of snowpack, assuming different magnitudes of an idealized climate warming (upward shifting of 1, 2 and 3 °C the temperature series). Snow energy and mass balance were simulated using the Cold Regions Hydrological Modelling platform (CRHM). CRHM was used to create a model that enabled correction of the all-wave incoming radiation fluxes from the observation sites for various slope aspects (N, NE, E, SE, S, SW,W,NW and flat areas), which enabled assessment of the differential impact of climate warming on snow processes on mountain slopes. The results showed that slope aspect was responsible for substantial variability in snow accumulation and the duration of the snowpack. Simulated variability markedly increased with warmer temperature conditions. Annual maximum snow accumulation (MSA) and annual snowpack duration (ASD) showed marked sensitivity to a warming of 1 °C. Thus, the sensitivity of the MSA in flat areas ranged from 11 to 17 % per degree C amongst the weather stations, and the ASD ranged from 11 to 20 days per degree C. There was a clear increase in the sensitivity of the snowpack to climate warming on those slopes that received intense solar radiation (S, SE and SW slopes) compared with those slopes where the incident radiation was more limited (N, NE and NW slopes). The sensitivity of the MSA and the ASD increased as the temperature increased, particularly on the most irradiated slopes. Large interannual variability was also observed. Thus, with more snow accumulation and longer duration the sensitivity of the snowpack to temperature decreased, especially on south-facing slopes.
pA  
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A08 01  1  ENG  @1 The effect of slope aspect on the response of snowpack to climate warming in the Pyrenees
A11 01  1    @1 LOPEZ-MORENO (J. I.)
A11 02  1    @1 REVUELTO (J.)
A11 03  1    @1 GILABERTE (M.)
A11 04  1    @1 MORAN-TEJEDA (E.)
A11 05  1    @1 PONS (M.)
A11 06  1    @1 JOVER (E.)
A11 07  1    @1 ESTEBAN (P.)
A11 08  1    @1 GARCIA (C.)
A11 09  1    @1 POMEROY (J. W.)
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A14 03      @1 Centre d'estudis de la neu i de la muntanya d'Andorra (CENMA) @2 Sant Julià de Lòria @3 AND @Z 7 aut.
A14 04      @1 Geological Institute of Cataluña (IGC) @2 Barcelona @3 ESP @Z 8 aut.
A14 05      @1 Center for Hydrology, University of Saskatchewan @2 Saskatoon, SK @3 CAN @Z 9 aut.
A20       @1 207-219
A21       @1 2014
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C01 01    ENG  @0 The aim of this study was to analyse the effect of slope aspect on the response of snowpack to climate warming in the Pyrenees. For this purpose, data available from five automatic weather stations were used to simulate the energy and mass balance of snowpack, assuming different magnitudes of an idealized climate warming (upward shifting of 1, 2 and 3 °C the temperature series). Snow energy and mass balance were simulated using the Cold Regions Hydrological Modelling platform (CRHM). CRHM was used to create a model that enabled correction of the all-wave incoming radiation fluxes from the observation sites for various slope aspects (N, NE, E, SE, S, SW,W,NW and flat areas), which enabled assessment of the differential impact of climate warming on snow processes on mountain slopes. The results showed that slope aspect was responsible for substantial variability in snow accumulation and the duration of the snowpack. Simulated variability markedly increased with warmer temperature conditions. Annual maximum snow accumulation (MSA) and annual snowpack duration (ASD) showed marked sensitivity to a warming of 1 °C. Thus, the sensitivity of the MSA in flat areas ranged from 11 to 17 % per degree C amongst the weather stations, and the ASD ranged from 11 to 20 days per degree C. There was a clear increase in the sensitivity of the snowpack to climate warming on those slopes that received intense solar radiation (S, SE and SW slopes) compared with those slopes where the incident radiation was more limited (N, NE and NW slopes). The sensitivity of the MSA and the ASD increased as the temperature increased, particularly on the most irradiated slopes. Large interannual variability was also observed. Thus, with more snow accumulation and longer duration the sensitivity of the snowpack to temperature decreased, especially on south-facing slopes.
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C03 02  X  ENG  @0 Atmosphere cryosphere interaction @5 02
C03 02  X  SPA  @0 Interacción atmósfera cryosfera @5 02
C03 03  2  FRE  @0 Réchauffement climat @5 03
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C03 06  2  SPA  @0 Declive @5 06
C03 07  2  FRE  @0 Bilan masse @5 07
C03 07  2  ENG  @0 mass balance @5 07
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C03 09  X  SPA  @0 Variación interanual @5 09
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C03 10  2  ENG  @0 digital simulation @5 10
C03 10  2  SPA  @0 Simulación numérica @5 10
C03 11  2  FRE  @0 Analyse sensibilité @5 11
C03 11  2  ENG  @0 sensitivity analysis @5 11
C03 12  2  FRE  @0 Pyrénées @2 NG @5 21
C03 12  2  ENG  @0 Pyrenees @2 NG @5 21
C03 12  2  SPA  @0 Pirineos @2 NG @5 21
C07 01  2  FRE  @0 Europe @2 564
C07 01  2  ENG  @0 Europe @2 564
C07 01  2  SPA  @0 Europa @2 564
N21       @1 286

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Pascal:14-0239501

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<div type="abstract" xml:lang="en">The aim of this study was to analyse the effect of slope aspect on the response of snowpack to climate warming in the Pyrenees. For this purpose, data available from five automatic weather stations were used to simulate the energy and mass balance of snowpack, assuming different magnitudes of an idealized climate warming (upward shifting of 1, 2 and 3 °C the temperature series). Snow energy and mass balance were simulated using the Cold Regions Hydrological Modelling platform (CRHM). CRHM was used to create a model that enabled correction of the all-wave incoming radiation fluxes from the observation sites for various slope aspects (N, NE, E, SE, S, SW,W,NW and flat areas), which enabled assessment of the differential impact of climate warming on snow processes on mountain slopes. The results showed that slope aspect was responsible for substantial variability in snow accumulation and the duration of the snowpack. Simulated variability markedly increased with warmer temperature conditions. Annual maximum snow accumulation (MSA) and annual snowpack duration (ASD) showed marked sensitivity to a warming of 1 °C. Thus, the sensitivity of the MSA in flat areas ranged from 11 to 17 % per degree C amongst the weather stations, and the ASD ranged from 11 to 20 days per degree C. There was a clear increase in the sensitivity of the snowpack to climate warming on those slopes that received intense solar radiation (S, SE and SW slopes) compared with those slopes where the incident radiation was more limited (N, NE and NW slopes). The sensitivity of the MSA and the ASD increased as the temperature increased, particularly on the most irradiated slopes. Large interannual variability was also observed. Thus, with more snow accumulation and longer duration the sensitivity of the snowpack to temperature decreased, especially on south-facing slopes.</div>
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<sZ>5 aut.</sZ>
<sZ>6 aut.</sZ>
</fA14>
<fA14 i1="03">
<s1>Centre d'estudis de la neu i de la muntanya d'Andorra (CENMA)</s1>
<s2>Sant Julià de Lòria</s2>
<s3>AND</s3>
<sZ>7 aut.</sZ>
</fA14>
<fA14 i1="04">
<s1>Geological Institute of Cataluña (IGC)</s1>
<s2>Barcelona</s2>
<s3>ESP</s3>
<sZ>8 aut.</sZ>
</fA14>
<fA14 i1="05">
<s1>Center for Hydrology, University of Saskatchewan</s1>
<s2>Saskatoon, SK</s2>
<s3>CAN</s3>
<sZ>9 aut.</sZ>
</fA14>
<fA20>
<s1>207-219</s1>
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<s1>INIST</s1>
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<s1>© 2014 INIST-CNRS. All rights reserved.</s1>
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<s0>14-0239501</s0>
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<s0>Theoretical and applied climatology</s0>
</fA64>
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<s0>AUT</s0>
</fA66>
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<s0>The aim of this study was to analyse the effect of slope aspect on the response of snowpack to climate warming in the Pyrenees. For this purpose, data available from five automatic weather stations were used to simulate the energy and mass balance of snowpack, assuming different magnitudes of an idealized climate warming (upward shifting of 1, 2 and 3 °C the temperature series). Snow energy and mass balance were simulated using the Cold Regions Hydrological Modelling platform (CRHM). CRHM was used to create a model that enabled correction of the all-wave incoming radiation fluxes from the observation sites for various slope aspects (N, NE, E, SE, S, SW,W,NW and flat areas), which enabled assessment of the differential impact of climate warming on snow processes on mountain slopes. The results showed that slope aspect was responsible for substantial variability in snow accumulation and the duration of the snowpack. Simulated variability markedly increased with warmer temperature conditions. Annual maximum snow accumulation (MSA) and annual snowpack duration (ASD) showed marked sensitivity to a warming of 1 °C. Thus, the sensitivity of the MSA in flat areas ranged from 11 to 17 % per degree C amongst the weather stations, and the ASD ranged from 11 to 20 days per degree C. There was a clear increase in the sensitivity of the snowpack to climate warming on those slopes that received intense solar radiation (S, SE and SW slopes) compared with those slopes where the incident radiation was more limited (N, NE and NW slopes). The sensitivity of the MSA and the ASD increased as the temperature increased, particularly on the most irradiated slopes. Large interannual variability was also observed. Thus, with more snow accumulation and longer duration the sensitivity of the snowpack to temperature decreased, especially on south-facing slopes.</s0>
</fC01>
<fC02 i1="01" i2="2">
<s0>001E02C</s0>
</fC02>
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<s0>Couverture neige</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG">
<s0>Snow cover</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA">
<s0>Cubierta nieve</s0>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE">
<s0>Interaction atmosphère cryosphère</s0>
<s5>02</s5>
</fC03>
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<s0>Atmosphere cryosphere interaction</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA">
<s0>Interacción atmósfera cryosfera</s0>
<s5>02</s5>
</fC03>
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<s0>Réchauffement climat</s0>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="2" l="ENG">
<s0>climate warming</s0>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="2" l="FRE">
<s0>Changement planétaire</s0>
<s5>04</s5>
</fC03>
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<s0>global change</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="2" l="SPA">
<s0>Cambio planetario</s0>
<s5>04</s5>
</fC03>
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<s0>Changement climatique</s0>
<s5>05</s5>
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<s0>climate change</s0>
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<s0>Versant</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="2" l="ENG">
<s0>slopes</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="2" l="SPA">
<s0>Declive</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="2" l="FRE">
<s0>Bilan masse</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="2" l="ENG">
<s0>mass balance</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="2" l="SPA">
<s0>Balance masa</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="2" l="FRE">
<s0>Bilan énergie</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="2" l="ENG">
<s0>energy balance</s0>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE">
<s0>Variation interannuelle</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG">
<s0>Interannual variation</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA">
<s0>Variación interanual</s0>
<s5>09</s5>
</fC03>
<fC03 i1="10" i2="2" l="FRE">
<s0>Simulation numérique</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="2" l="ENG">
<s0>digital simulation</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="2" l="SPA">
<s0>Simulación numérica</s0>
<s5>10</s5>
</fC03>
<fC03 i1="11" i2="2" l="FRE">
<s0>Analyse sensibilité</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="2" l="ENG">
<s0>sensitivity analysis</s0>
<s5>11</s5>
</fC03>
<fC03 i1="12" i2="2" l="FRE">
<s0>Pyrénées</s0>
<s2>NG</s2>
<s5>21</s5>
</fC03>
<fC03 i1="12" i2="2" l="ENG">
<s0>Pyrenees</s0>
<s2>NG</s2>
<s5>21</s5>
</fC03>
<fC03 i1="12" i2="2" l="SPA">
<s0>Pirineos</s0>
<s2>NG</s2>
<s5>21</s5>
</fC03>
<fC07 i1="01" i2="2" l="FRE">
<s0>Europe</s0>
<s2>564</s2>
</fC07>
<fC07 i1="01" i2="2" l="ENG">
<s0>Europe</s0>
<s2>564</s2>
</fC07>
<fC07 i1="01" i2="2" l="SPA">
<s0>Europa</s0>
<s2>564</s2>
</fC07>
<fN21>
<s1>286</s1>
</fN21>
</pA>
</standard>
</inist>
</record>

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