Tropical and Subtropical Wetlands Distribution (ICPSR doi:10.17528/CIFOR/DATA.00058)

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Part 1: Document Description
Part 2: Study Description
Part 3: Data Files Description
Part 4: Variable Description
Part 5: Other Study-Related Materials
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Tropical and Subtropical Wetlands Distribution

doi:10.17528/CIFOR/DATA.00058

Center for International Forestry Research (CIFOR)

2017-04-17

7

Gumbricht, T.; Román-Cuesta, R.M.; Verchot, L.V.; Herold, M.; Wittmann, F; Householder, E.; Herold, N.; Murdiyarso, D., 2017, "Tropical and Subtropical Wetlands Distribution", https://doi.org/10.17528/CIFOR/DATA.00058, Center for International Forestry Research (CIFOR), V7, UNF:6:Bc9aFtBpam27aFOCMgW71Q== [fileUNF]

Tropical and Subtropical Wetlands Distribution

doi:10.17528/CIFOR/DATA.00058

Gumbricht, T. (Center for International Forestry Research (CIFOR))

Román-Cuesta, R.M. (Wageningen University & Research)

Verchot, L.V. (International Center for Tropical Agriculture)

Herold, M. (Wageningen University & Research)

Wittmann, F (Columbia University)

Householder, E. (Columbia University)

Herold, N. (Wageningen University & Research)

Murdiyarso, D. (Center for International Forestry Research (CIFOR))

ArcGIS

QGIS

ER Mapper

Erdas Imagine

ENVI

GRASS GIS

Center for International Forestry Research (CIFOR)

Center for International Forestry Research

CIFOR-RDM

Román-Cuesta, R.M.

Salim, Mohammad Agus

2017-04-07

2017-03-15

Climate Change, Energy and low carbon development (CCE), peatlands, peat, wetlands

Climate change, Forest Management

Wetlands are important providers of ecosystem services and key regulators of climate change. They positively contribute to global warming through their greenhouse gas emissions, and negatively through the accumulation of organic material in histosols, particularly in peatlands. Our understanding of wetlands’ services is currently constrained by limited knowledge on their distribution, extent, volume, inter-annual flood variability, and disturbance levels. We present an expert system approach to estimate wetland and peatland areas, depths and volumes, which relies on three biophysical indices related to wetland and peat formation: 1. Long-term water supply exceeding atmospheric water demand; 2. Annually or seasonally water-logged soils; 3. A geomorphological position where water is supplied and retained.<br><br> The dataset is version 2 with significant improvements compare to previous version. It shows distribution of wetland, peatland and peat depth that covers the tropics and sub tropics (40° N to 60° S; 180° E to -180° W), excluding small islands. It was mapped in 231 meters spatial resolution. The dataset can be viewed in this interactive map: <a href="http://www.cifor.org/global-wetlands/">http://www.cifor.org/global-wetlands/</a>.

2011-

spatial data

<a href="http://creativecommons.org/licenses/by/4.0/" target="_blank" rel="nofollow"><img alt="Creative Commons License" src="https://i.creativecommons.org/l/by/4.0/88x31.png"></a> <br> These data and documents are licensed under a <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank" rel="nofollow"> Creative Commons Attribution 4.0 International license.</a> You may copy, distribute and transmit the data as long as you acknowledge the source through proper <a href="http://best-practices.dataverse.org/data-citation/" target="_blank" rel="nofollow">data citation</a>.

http://www.cifor.org/pid/6419

Gumbricht, T., Román-Cuesta, R.M., Verchot, L.V., Herold, M., Wittmann, F., Householder, E., Herold, N., Murdiyarso, D.. 2017. An expert system model for mapping tropical wetlands and peatlands reveals South America as the largest contributor.  Global Change Biology 23(9):3581-3599

http://www.cifor.org/pid/6412

CIFOR. 2017. Global Wetlands Map: Help us map the world's wetlands.  Bogor, Indonesia: Center for International Forestry Research (CIFOR).

http://www.cifor.org/pid/6452

Murdiyarso, D., Román-Cuesta, R.M., Verchot, L.V., Herold, M., Gumbricht, T., Herold, N., Martius, C.. 2017. New map reveals more peat in the tropics. 

Croft-Cusworth, C.. 2016-09-27. A map of the world’s wetlands. 

https://www.cifor.org/global-wetlands/

• Number of cases: 25

• No. of variables per record: 4

• Type of File: text/tab-separated-values

UNF:6:Bc9aFtBpam27aFOCMgW71Q==

• TropicalandSubtropicalWetlands - TropicalandSubtropicalWetlands
• B - B
• C - C
• D - D

f2352 Location:

Variable Format: character

Notes: UNF:6:fL7q5VF3c3rv8cdL88Tqaw==

f2352 Location:

Variable Format: character

Notes: UNF:6:trWbV2fuNa2A21MqGA4JBw==

f2352 Location:

Variable Format: character

Notes: UNF:6:4NvHWTj85RLoGAxE3u+mbw==

f2352 Location:

Variable Format: character

Notes: UNF:6:xoKvZIyC63VaBdY61Me2VQ==

Label:

TROP-SUBTROP_PeatV21_2016_CIFOR.7z

Text:

Distribution of peatland that covers the tropics and sub tropics, excluding small islands. It was mapped in 231 meters spatial resolution. Peat is here defined as any soil having at least 30cm of decomposed or semi-decomposed organic material with at least 50% of organic matter. This corresponds to 29% of carbon content using 1.72 as the transformation factor. The peatland map is produced by adding the peat forming wetlands: mangrove (20), swamp/bog (30), Fen (40), riverine (50), and floodswamps (60) (note: the number in parentheses refer to pixel code of each class in Wetlands dataset). Our map of peatlands was contrasted against n=275 geo-positioned soil profiles containing peat, with 65% of agreement. Further fieldwork is however needed to validate our map. Mangroves are here considered to host the thresholds of depth and organic matter content needed for peat definition, although mineral soil may prevail. Mangroves contribute with ca. 180,000 km2 to the 1.7 million km2 of peatlands (11%), which would need further ground validation (i.e. in areas like Indonesian Papua have large extents of mangrove that contribute to peat, which would need ground-truthing to validate if they contain peat as defined here).

application/x-7z-compressed

Label:

TROP-SUBTROP_WetlandV3b_2016_CIFOR.7z

Text:

The new version of the Global Tropical and Subtropical Wetlands Map was improved by generalization analysis such as Majority filter and Boundary Clean tools. The generalization analysis tools are used to clean up small erroneous data (eliminate isolated pixels) in the raster. The edges are smoothed by expanding and shrinking boundaries or by growing or shrinking zones based on the values within the neighborhood pixels. Moreover, an ArcGIS layer file was generated for facilitating the visualization. Contact: Dr. Arimatéa Ximenes Email: a.ximenes@cgiar.org

application/x-7z-compressed

Label:

Tropical and Subtropical Peatdepth.7z

Text:

Distribution and depth of peat in meter that covers the tropics and sub tropics, excluding small islands. It was mapped in 231 meters spatial resolution. Warning: A validation of our depth map against ground measured peat depths (i.e. soil profiles) suggests that our deepest values (>10m) overestimate depth. For this reason, all depths >10m have been thresholded to 10m.

application/octet-stream

Label:

Tropical and Subtropical Wetlands.7z

Text:

Distribution of wetland that covers the tropics and sub tropics, excluding small islands. It was mapped in 231 meters spatial resolution by combining a hydrological model and annual time series of satellite-derived estimates of soil moisture to represent water flow and surface wetness that are then combined with geomorphological data.

application/octet-stream