| layout | title | prev | next | gcam-version |
|---|---|---|---|---|
index |
Common Assumptions |
diagram.html |
inputs_demand.html |
v5.4 |
These assumptions are shared throughout the GCAM model.
GCAM subdivides the world into 32 geopolitical regions, representing countries or collections of countries (see Table below).
| GCAM Region | Countries |
|---|---|
| Africa_Eastern | Burundi, Comoros, Djibouti, Eritrea, Ethiopia, Kenya, Madagascar, Mauritius, Reunion, Rwanda, Sudan, Somalia, Uganda |
| Africa_Northern | Algeria, Egypt, Western Sahara, Libya, Morocco, Tunisia |
| Africa_Southern | Angola, Botswana, Lesotho, Mozambique, Malawi, Namibia, Swaziland, Tanzania, Zambia, Zimbabwe |
| Africa_Western | Benin, Burkina Faso, Central African Republic, Cote d’Ivoire, Cameroon, Democratic Republic of the Congo, Congo, Cape Verde, Gabon, Ghana, Guinea, Gambia, Guinea-Bissau, Equatorial Guinea, Liberia, Mali, Mauritania, Niger, Nigeria, Senegal, Sierra Leone, Sao Tome and Principe, Chad, Togo |
| Argentina | Argentina |
| Australia_NZ | Australia, New Zealand |
| Brazil | Brazil |
| Canada | Canada |
| Central America and the Caribbean | Aruba, Anguilla, Netherlands Antilles, Antigua & Barbuda, Bahamas, Belize, Bermuda, Barbados, Costa Rica, Cuba, Cayman Islands, Dominica, Dominican Republic, Guadeloupe, Grenada, Guatemala, Honduras, Haiti, Jamaica, Saint Kitts and Nevis, Saint Lucia, Montserrat, Martinique, Nicaragua, Panama, El Salvador, Trinidad and Tobago, Saint Vincent and the Grenadines |
| Central Asia | Armenia, Azerbaijan, Georgia, Kazakhstan, Kyrgyzstan, Mongolia, Tajikistan, Turkmenistan, Uzbekistan |
| China | China |
| Colombia | Colombia |
| EU-12 | Bulgaria, Cyprus, Czech Republic, Estonia, Hungary, Lithuania, Latvia, Malta, Poland, Romania, Slovakia, Slovenia |
| EU-15 | Andorra, Austria, Belgium, Denmark, Finland, France, Germany, Greece, Greenland, Ireland, Italy, Luxembourg, Monaco, Netherlands, Portugal, Sweden, Spain, United Kingdom |
| Europe_Eastern | Belarus, Moldova, Ukraine |
| European Free Trade Association | Iceland, Norway, Switzerland |
| Europe_Non_EU | Albania, Bosnia and Herzegovina, Croatia, Macedonia, Montenegro, Serbia, Turkey |
| India | India |
| Indonesia | Indonesia |
| Japan | Japan |
| Mexico | Mexico |
| Middle East | United Arab Emirates, Bahrain, Iran, Iraq, Israel, Jordan, Kuwait, Lebanon, Oman, Palestine, Qatar, Saudi Arabia, Syria, Yemen |
| Pakistan | Pakistan |
| Russia | Russia |
| South Africa | South Africa |
| South America_Northern | French Guiana, Guyana, Suriname, Venezuela |
| South America_Southern | Bolivia, Chile, Ecuador, Peru, Paraguay, Uruguay |
| South Asia | Afghanistan, Bangladesh, Bhutan, Sri Lanka, Maldives, Nepal |
| Southeast Asia | American Samoa, Brunei Darussalam, Cocos (Keeling) Islands, Cook Islands, Christmas Island, Fiji, Federated States of Micronesia, Guam, Cambodia, Kiribati, Lao Peoples Democratic Republic, Marshall Islands, Myanmar, Northern Mariana Islands, Malaysia, Mayotte, New Caledonia, Norfolk Island, Niue, Nauru, Pacific Islands Trust Territory, Pitcairn Islands, Philippines, Palau, Papua New Guinea, Democratic Peoples Republic of Korea, French Polynesia, Singapore, Solomon Islands, Seychelles, Thailand, Tokelau, Timor Leste, Tonga, Tuvalu, Viet Nam, Vanuatu, Samoa |
| South Korea | South Korea |
| Taiwan | Taiwan |
| USA | United States |
Table: Mapping from GCAM region to country
We have represented the water at the scale of major river basins. Currently 235 global river basins are represented in GCAM. The full list of major river basins included in GCAM is shown in Table 1. Each of the GCAM regions contains the river basins within its border. In many instances, river basins may overlap across multiple GCAM regions where water resources are shared. A few remote basins without water demand representations, such as Antarctica, are not actively modeled.
Table 1. Major Water Basins in GCAM {: .tbl}
|id|name|id|name|id|name|id|name|id|name| |:--|:--|:--|:--|:--|:--|:--|:--|:--|:--|:--| 1|Arctic Ocean Islands|51|Japan|101|Caribbean|151|Lake Chad|201|New Zealand| 2|Northwest Territories|52|Caspian Sea-East Coast|102|Hamun-i-Mashkel|152|Senegal|202|Australia-South Coast 3|Siberia-North Coast|53|Don|103|Taiwan|153|Cauvery|203|Mar Chiquita| 4|Siberia-West Coast|54|Danube|104|Arabian Sea Coast|154|Sri Lanka|204|South Africa-West Coast 5|Kara Sea Coast|55|Adriatic Sea-Greece-Black Sea Coast|105|North Gulf|155|India South Coast|205|Salinas Grandes 6|Lena|56|Ob|106|Yangtze|156|Orinoco|206|La Plata 7|Pacific and Arctic Coast|57|Po|107|Sabarmati|157|Colombia-Ecuador-Pacific Coast|207|North Chile-Pacific Coast 8|Scandinavia-North Coast|58|Amu Darya|108|Xun Jiang|158|Palau and East Indonesia|208|Murray-Darling 9|Russia-Barents Sea Coast|59|Italy-West Coast|109|Hong-Red River|159|North Borneo Coast|209|Pampas Region 10|Mackenzie|60|Spain-Portugal-Atlantic Coast|110|Ganges-Bramaputra|160|Volta|210|North Argentina-South Atlantic Coast 11|Iceland|61|France-South Coast|111|Yucatan Peninsula|161|Northeast South America-South Atlantic Coast|211|Tasmania 12|Sweden|62|Rhone|112|South China Sea Coast|162|Gulf of Guinea|212|South America-Colorado 13|Finland|63 |Mediterranean Sea Islands |113|Mahi|163|Sumatra|213|Negro 14|Northern Dvina|64|Gironde|114| Mexico-Interior|164|Sulawesi|214|Central Patagonia Highlands 15|Hudson Bay Coast|65| North and South Korea|115|Pacific Central Coast|165|Kalimantan|215|South Argentina-South Atlantic Coast 16|Scotland|66|Bo Hai-Korean Bay-North Coast|116|Bay of Bengal-North East Coast|166|Magdalena|216 |Antarctica 17|Neva|67|Spain-South and East Coast|117|Tapti|167|Irian Jaya Coast|217|California River 18|Volga|68|Lake Balkash|118|Yasai|168|Amazon|218|Upper Mississippi 19|Atlantic Ocean Seaboard|69|Tiber|119|Philippines|169|South Chile-Pacific Coast|219|Lower Mississippi River 20|Baltic Sea Coast|70| Black Sea-South Coast|120|Brahamani|170|Shebelli-Juba|220|Upper Colorado River 21|Denmark-Germany Coast|71|Tagus|121|North Marina Islands and Guam|171|Africa-East Central Coast|221|Lower Colorado River 22|Narva|72|Caspian Sea-South West Coast|122|Mahandi|172|North Brazil-South Atlantic Coast|222 |Great 23|Saskatchewan-Nelson|73| Ebro|123|Godavari|173|Papua New Guinea Coast|223|Missouri River 24|Ireland|74 |Douro|124|Hainan|174|Tocantins|224|Arkansas White Red 25|Daugava|75 |Mediterranean Sea-East Coast|125|Mekong|175|Java-Timor|225|Texas Gulf Coast 26|England and Wales|76|Syr Darya|126|Viet Nam-Coast|176|Solomon Islands|226|South Atlantic Gulf 27|Fraser|77|Ziya He-Interior|127|Salween|177|Madasgacar|227|Great Lakes 28|Ems-Weser| 78 |China Coast| 128 |India North East Coast|178|Sepik|228|Ohio River 29|Oder|79|Huang He|129 |India West Coast|179|Rift Valley|229|Pacific Northwest 30|Wisla|80|Mediterranean South Coast|130|Papaloapan|180|Peru-Pacific Coast|230|Tennessee River 31|Elbe|81|Guadiana|131 |Rio Lerma|181|Fly|231|Rio Grande River 32|Rhine|82|Central Iran|132|Rio Verde|182|Angola-Coast|232|New England 33|Poland Coast| 83|Guadalquivir|133|Grijalva-Usumacinta|183|Congo|233|Mid Atlantic 34|Churchill|84|Tigris-Euphrates|134|Rio Balsas|184|Australia-North Coast|234|Hawaii 35|Neman|85|Tarim Interior |135|Southern Central America|185|South Pacific Islands|235|Narmada 36|Scheldt|86|Africa-North West Coast|136|Isthmus of Tehuantepec|186|East Brazil-South Atlantic Coast 37|Russia-South East Coast|87|Nile|137|Irrawaddy|187|Parnaiba 38|Ural|88|Persian Gulf Coast|138|Sittang|188|Zambezi 39|Dnieper|89|Indus|139 |Peninsula Malaysia|189|Australia-East Coast 40|St Lawrence|90|Farahrud|140|Krishna|190|Africa-Indian Ocean Coast 41|France-West Coast|91|Baja California|141|Andaman-Nicobar Islands|191|Australia-West Coast 42|Gobi Interior|92|Plateau of Tibet Interior|142|Africa-West Coast|192|Sao Francisco 43|Amur|93|Red Sea-East Coast|143|Caribbean Coast|193|Australia-Interior 44|Loire|94|Arabian Peninsula|144|Africa-North Interior|194|Orange 45|Caspian Sea Coast|95|Dead Sea|145|India East Coast|195|Uruguay-Brazil-South Atlantic Coast 46|Seine|96|Mexico-Northwest Coast|146|Chao Phraya|196|Namibia-Coast 47|Black Sea-North Coast|97|Helmand|147|Pennar|197|Africa-South Interior 48|Yenisey|98|Sinai Peninsula|148|Gulf of Thailand Coast|198|South Africa-South Coast 49|Dniester|99|Eastern Jordan-Syria|149|Niger|199|Limpopo 50|Italy-East Coast|100 |Africa-Red Sea-Gulf of Aden Coast|150|Micronesia|200|La Puna Region
For GCAM3.0 through GCAM4.4, the Agriculture and Land Use model subdivided the GCAM geopolitical regions into as many as 18 climatically defined agro-ecological zones (AEZs) developed by the GTAP group. GCAM5+ switches subregions to water basin-defined geographic land units (GLUs). The land data system files are produced by the Moirai, described in Di Vittorio et al. (2016).
The GCAM data system can produce such data sets annually beginning in 1971. Currently, GCAM uses data from 1990, 2005, 2010, and 2015 to initialize the model, but could be initialized to any year beginning in 1971.
Currently, GCAM models the future from 2020 to 2100 in 5 year time steps. The time step is variable and can be changed in the data system.
GCAM represents choices among options using a logit function. For more information on economic choice, see choice.