A stochastic model for the polygonal tundra based on Poisson-Voronoi diagrams
Abstract. Subgrid processes occur in various ecosystems and landscapes but, because of their small scale, they are not represented or poorly parameterized in climate models. These local heterogeneities are often important or even fundamental for energy and carbon balances. This is especially true fo...
Main Authors: | , , , , , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
2013
|
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1036.371 http://www.earth-syst-dynam.net/4/187/2013/esd-4-187-2013.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.1036.371 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.1036.371 2023-05-15T18:40:00+02:00 A stochastic model for the polygonal tundra based on Poisson-Voronoi diagrams F Cresto Aleina V Brovkin S Muster J Boike L Kutzbach T Sachs S Zuyev The Pennsylvania State University CiteSeerX Archives 2013 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1036.371 http://www.earth-syst-dynam.net/4/187/2013/esd-4-187-2013.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1036.371 http://www.earth-syst-dynam.net/4/187/2013/esd-4-187-2013.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.earth-syst-dynam.net/4/187/2013/esd-4-187-2013.pdf text 2013 ftciteseerx 2020-03-08T01:15:24Z Abstract. Subgrid processes occur in various ecosystems and landscapes but, because of their small scale, they are not represented or poorly parameterized in climate models. These local heterogeneities are often important or even fundamental for energy and carbon balances. This is especially true for northern peatlands and in particular for the polygonal tundra, where methane emissions are strongly influenced by spatial soil heterogeneities. We present a stochastic model for the surface topography of polygonal tundra using PoissonVoronoi diagrams and we compare the results with available recent field studies. We analyze seasonal dynamics of water table variations and the landscape response under different scenarios of precipitation income. We upscale methane fluxes by using a simple idealized model for methane emission. Hydraulic interconnectivities and large-scale drainage may also be investigated through percolation properties and thresholds in the Voronoi graph. The model captures the main statistical characteristics of the landscape topography, such as polygon area and surface properties as well as the water balance. This approach enables us to statistically relate large-scale properties of the system to the main small-scale processes within the single polygons. Text Tundra Unknown |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
Abstract. Subgrid processes occur in various ecosystems and landscapes but, because of their small scale, they are not represented or poorly parameterized in climate models. These local heterogeneities are often important or even fundamental for energy and carbon balances. This is especially true for northern peatlands and in particular for the polygonal tundra, where methane emissions are strongly influenced by spatial soil heterogeneities. We present a stochastic model for the surface topography of polygonal tundra using PoissonVoronoi diagrams and we compare the results with available recent field studies. We analyze seasonal dynamics of water table variations and the landscape response under different scenarios of precipitation income. We upscale methane fluxes by using a simple idealized model for methane emission. Hydraulic interconnectivities and large-scale drainage may also be investigated through percolation properties and thresholds in the Voronoi graph. The model captures the main statistical characteristics of the landscape topography, such as polygon area and surface properties as well as the water balance. This approach enables us to statistically relate large-scale properties of the system to the main small-scale processes within the single polygons. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
F Cresto Aleina V Brovkin S Muster J Boike L Kutzbach T Sachs S Zuyev |
spellingShingle |
F Cresto Aleina V Brovkin S Muster J Boike L Kutzbach T Sachs S Zuyev A stochastic model for the polygonal tundra based on Poisson-Voronoi diagrams |
author_facet |
F Cresto Aleina V Brovkin S Muster J Boike L Kutzbach T Sachs S Zuyev |
author_sort |
F Cresto Aleina |
title |
A stochastic model for the polygonal tundra based on Poisson-Voronoi diagrams |
title_short |
A stochastic model for the polygonal tundra based on Poisson-Voronoi diagrams |
title_full |
A stochastic model for the polygonal tundra based on Poisson-Voronoi diagrams |
title_fullStr |
A stochastic model for the polygonal tundra based on Poisson-Voronoi diagrams |
title_full_unstemmed |
A stochastic model for the polygonal tundra based on Poisson-Voronoi diagrams |
title_sort |
stochastic model for the polygonal tundra based on poisson-voronoi diagrams |
publishDate |
2013 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1036.371 http://www.earth-syst-dynam.net/4/187/2013/esd-4-187-2013.pdf |
genre |
Tundra |
genre_facet |
Tundra |
op_source |
http://www.earth-syst-dynam.net/4/187/2013/esd-4-187-2013.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1036.371 http://www.earth-syst-dynam.net/4/187/2013/esd-4-187-2013.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766229102099955712 |