Quantifying energy and mass fluxes controlling Godthåbsfjord freshwater input in a 5-km simulation (1991-2012)

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Standard

Quantifying energy and mass fluxes controlling Godthåbsfjord freshwater input in a 5-km simulation (1991-2012). / Langen, Peter L.; Mottram, R. H.; Christensen, J. H.; Boberg, F.; Rodehacke, C. B.; Stendel, M.; van As, D.; Ahlstrøm, A. P.; Mortensen, J.; Rysgaard, S.; Petersen, D.; Svendsen, K. H.; Adalgeirsdóttir, G.; Cappelen, J.

I: Journal of Climate, Bind 28, Nr. 9, 2015, s. 3694-3713.

Publikation: Bidrag til tidsskriftTidsskriftartikelfagfællebedømt

Harvard

Langen, PL, Mottram, RH, Christensen, JH, Boberg, F, Rodehacke, CB, Stendel, M, van As, D, Ahlstrøm, AP, Mortensen, J, Rysgaard, S, Petersen, D, Svendsen, KH, Adalgeirsdóttir, G & Cappelen, J 2015, 'Quantifying energy and mass fluxes controlling Godthåbsfjord freshwater input in a 5-km simulation (1991-2012)', Journal of Climate, bind 28, nr. 9, s. 3694-3713. https://doi.org/10.1175/JCLI-D-14-00271.1

APA

Langen, P. L., Mottram, R. H., Christensen, J. H., Boberg, F., Rodehacke, C. B., Stendel, M., van As, D., Ahlstrøm, A. P., Mortensen, J., Rysgaard, S., Petersen, D., Svendsen, K. H., Adalgeirsdóttir, G., & Cappelen, J. (2015). Quantifying energy and mass fluxes controlling Godthåbsfjord freshwater input in a 5-km simulation (1991-2012). Journal of Climate, 28(9), 3694-3713. https://doi.org/10.1175/JCLI-D-14-00271.1

Vancouver

Langen PL, Mottram RH, Christensen JH, Boberg F, Rodehacke CB, Stendel M o.a. Quantifying energy and mass fluxes controlling Godthåbsfjord freshwater input in a 5-km simulation (1991-2012). Journal of Climate. 2015;28(9):3694-3713. https://doi.org/10.1175/JCLI-D-14-00271.1

Author

Langen, Peter L. ; Mottram, R. H. ; Christensen, J. H. ; Boberg, F. ; Rodehacke, C. B. ; Stendel, M. ; van As, D. ; Ahlstrøm, A. P. ; Mortensen, J. ; Rysgaard, S. ; Petersen, D. ; Svendsen, K. H. ; Adalgeirsdóttir, G. ; Cappelen, J. / Quantifying energy and mass fluxes controlling Godthåbsfjord freshwater input in a 5-km simulation (1991-2012). I: Journal of Climate. 2015 ; Bind 28, Nr. 9. s. 3694-3713.

Bibtex

@article{f997786d4d5e435193ad9f8587801f00,
title = "Quantifying energy and mass fluxes controlling Godth{\aa}bsfjord freshwater input in a 5-km simulation (1991-2012)",
abstract = "Freshwater runoff to fjords with marine-terminating glaciers along the Greenland Ice Sheet margin has an impact on fjord circulation and potentially ice sheet mass balance through increasing heat transport to the glacier front. Here, the authors use the high-resolution (5.5 km) HIRHAM5 regional climate model, allowing high detail in topography and surface types, to estimate freshwater input to Godth{\aa}bsfjord in southwest Greenland. Model output is compared to hydrometeorological observations and, while simulated daily variability in temperature and downwelling radiation shows high correlation with observations (typically >0.9), there are biases that impact the results. In particular, overestimated albedo leads to underestimation of melt and runoff at low elevations. In the model simulation (1991-2012), the ice sheet experiences increasing energy input from the surface turbulent heat flux (up to elevations of 2000 m) and shortwave radiation (at all elevations). Southerly wind anomalies and declining cloudiness due to an increase in atmospheric pressure over north Greenland contribute to increased summer melt. This results in declining surface mass balance (SMB), increasing surface runoff, and upward shift of the equilibrium line altitude. SMB is reconstructed back to 1890 though regression between simulated SMB and observed temperature and precipitation, with added uncertainty in the period 1890-1952 because of possible inhomogeneity in the precipitation record. SMB as low as in recent years appears to have occurred before, most notably around 1930, 1950, and 1960. While previous low SMBs were mainly caused by low accumulation, those around 1930 and in the 2000s are mainly due to warming.",
keywords = "Glaciers, Heat budgets/fluxes, Ice sheets, Regional models, Surface fluxes, Water budget",
author = "Langen, {Peter L.} and Mottram, {R. H.} and Christensen, {J. H.} and F. Boberg and Rodehacke, {C. B.} and M. Stendel and {van As}, D. and Ahlstr{\o}m, {A. P.} and J. Mortensen and S. Rysgaard and D. Petersen and Svendsen, {K. H.} and G. Adalgeirsd{\'o}ttir and J. Cappelen",
year = "2015",
doi = "10.1175/JCLI-D-14-00271.1",
language = "English",
volume = "28",
pages = "3694--3713",
journal = "Journal of Climate",
issn = "0894-8755",
publisher = "American Meteorological Society",
number = "9",

}

RIS

TY - JOUR

T1 - Quantifying energy and mass fluxes controlling Godthåbsfjord freshwater input in a 5-km simulation (1991-2012)

AU - Langen, Peter L.

AU - Mottram, R. H.

AU - Christensen, J. H.

AU - Boberg, F.

AU - Rodehacke, C. B.

AU - Stendel, M.

AU - van As, D.

AU - Ahlstrøm, A. P.

AU - Mortensen, J.

AU - Rysgaard, S.

AU - Petersen, D.

AU - Svendsen, K. H.

AU - Adalgeirsdóttir, G.

AU - Cappelen, J.

PY - 2015

Y1 - 2015

N2 - Freshwater runoff to fjords with marine-terminating glaciers along the Greenland Ice Sheet margin has an impact on fjord circulation and potentially ice sheet mass balance through increasing heat transport to the glacier front. Here, the authors use the high-resolution (5.5 km) HIRHAM5 regional climate model, allowing high detail in topography and surface types, to estimate freshwater input to Godthåbsfjord in southwest Greenland. Model output is compared to hydrometeorological observations and, while simulated daily variability in temperature and downwelling radiation shows high correlation with observations (typically >0.9), there are biases that impact the results. In particular, overestimated albedo leads to underestimation of melt and runoff at low elevations. In the model simulation (1991-2012), the ice sheet experiences increasing energy input from the surface turbulent heat flux (up to elevations of 2000 m) and shortwave radiation (at all elevations). Southerly wind anomalies and declining cloudiness due to an increase in atmospheric pressure over north Greenland contribute to increased summer melt. This results in declining surface mass balance (SMB), increasing surface runoff, and upward shift of the equilibrium line altitude. SMB is reconstructed back to 1890 though regression between simulated SMB and observed temperature and precipitation, with added uncertainty in the period 1890-1952 because of possible inhomogeneity in the precipitation record. SMB as low as in recent years appears to have occurred before, most notably around 1930, 1950, and 1960. While previous low SMBs were mainly caused by low accumulation, those around 1930 and in the 2000s are mainly due to warming.

AB - Freshwater runoff to fjords with marine-terminating glaciers along the Greenland Ice Sheet margin has an impact on fjord circulation and potentially ice sheet mass balance through increasing heat transport to the glacier front. Here, the authors use the high-resolution (5.5 km) HIRHAM5 regional climate model, allowing high detail in topography and surface types, to estimate freshwater input to Godthåbsfjord in southwest Greenland. Model output is compared to hydrometeorological observations and, while simulated daily variability in temperature and downwelling radiation shows high correlation with observations (typically >0.9), there are biases that impact the results. In particular, overestimated albedo leads to underestimation of melt and runoff at low elevations. In the model simulation (1991-2012), the ice sheet experiences increasing energy input from the surface turbulent heat flux (up to elevations of 2000 m) and shortwave radiation (at all elevations). Southerly wind anomalies and declining cloudiness due to an increase in atmospheric pressure over north Greenland contribute to increased summer melt. This results in declining surface mass balance (SMB), increasing surface runoff, and upward shift of the equilibrium line altitude. SMB is reconstructed back to 1890 though regression between simulated SMB and observed temperature and precipitation, with added uncertainty in the period 1890-1952 because of possible inhomogeneity in the precipitation record. SMB as low as in recent years appears to have occurred before, most notably around 1930, 1950, and 1960. While previous low SMBs were mainly caused by low accumulation, those around 1930 and in the 2000s are mainly due to warming.

KW - Glaciers

KW - Heat budgets/fluxes

KW - Ice sheets

KW - Regional models

KW - Surface fluxes

KW - Water budget

U2 - 10.1175/JCLI-D-14-00271.1

DO - 10.1175/JCLI-D-14-00271.1

M3 - Journal article

AN - SCOPUS:84922424828

VL - 28

SP - 3694

EP - 3713

JO - Journal of Climate

JF - Journal of Climate

SN - 0894-8755

IS - 9

ER -

ID: 186939566