Climate map explorer - DEA Efficiency

ci:grasp provides a growing collection of interactive maps depicting both climate stimuli and climate impacts.
Use the ci:grasp map explorer to browse this pool of interactive climate maps.
select map:
spatial extent:
variable:
variable subclass:
GCM:
scenario:
temporal reference:
temporal aggregation:
nope
Note: information on the selected map is displayed below.
xxx
mouse at lon = ... °, lat = ... °

Note

Please avoid over-interpreting the maps. Maps only have a certain explanatory power. For example, the data presented on the interactive world map is not applicable for highly localized projections, forecasts, and "ground truthing" events and processes there.

Please make use of the ci:grasp glossary to clarify terms you are unfamiliar with.

It is helpful to discover whether and where adaption measures are currently taking place, and what type of impacts they address. You can search for adaptation projects in our adaptation project database.

Please refer to the ci:grasp list of references for an ample body of scientific literature. The references in the text throughout the platform are collected there.


General information

The colours indicate the relative efficiency of the given nation in comparison to all other nations with regard to cereal production when taking agropotential and nitrous oxide emissions into account. The darker the colour, the more efficient a countries cereal production.

Methodology

Computation of agropotential:
We start with three data sets. The first one contains the agropotential per grid cell, the second one tells whether there is arable land in this grid cell or not, and finally, the third one maps grid cells to countries. We loop over the grid cells accumulating the agropotential of grid cells containing arable land into each country, and eventually, compute the average agropotential per country out of it.

Analysis:
Data Envelopment Analysis (DEA) is applied with nations as decision making units (DMU). The inputs of the DMUs are agricultural nitrous oxide emissions and agropotential, while the output is cereal yield. Thus, the computed efficiencies are a relative measure of efficiency of these nations regarding the production of cerial with respect to their available agropotential and the emitted nitrous oxide emissions.

Data Sources

DimensionDataset nameUnitScenariosResolutionSource
Cereal yield Cereal yield kg/ha 2003 national http://www.worldbank.org/
Nitrous oxide emissions Agricultural nitrous oxide emissions from agricultural soils MtCO2eq 2005 national http://www.epa.gov/methane/intlanalyses.html
Nitrous oxide emissions Nitrous Oxide Emissions from Manure Management MtCO2eq 2005 national http://www.epa.gov/methane/intlanalyses.html
Nitrous oxide emissions Nitrous Oxide Emissions from Other Agricultural Sources MtCO2eq 2005 national http://www.epa.gov/methane/intlanalyses.html
Agropotential modelled productivity of grassland from GISMO/IMAGE kgC/m2 1998 Alcamo, J., Leemans, R. and Kreileman, G.G.J., 1998b. Global change scenarios of the 21st century. Results from the IMAGE 2.1 model. Pergamon and Elsevier Science, London.