{"id":4249,"date":"2023-09-27T09:18:04","date_gmt":"2023-09-27T07:18:04","guid":{"rendered":"https:\/\/nersc.no\/?page_id=4249"},"modified":"2025-10-06T14:17:36","modified_gmt":"2025-10-06T12:17:36","slug":"past-climate","status":"publish","type":"page","link":"https:\/\/nersc.no\/en\/products-and-services\/climate\/past-climate\/","title":{"rendered":"Past climate"},"content":{"rendered":"

[vc_section css=”.vc_custom_1669014075681{background-color: #ffffff !important;}” el_class=”full-image”][vc_row][vc_column]\n\t\t\t

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Past climate<\/h1><\/div>

Climate models can be used to create reconstructions and studies of what the climate was like in the past.<\/p><\/div>[vc_column_text css=””]<\/p>\n

To make the models as reliable as possible, data assimilation is used, a method for transferring observations of various variables into mathematical models.<\/p>\n

We create reanalyses \u2013 reconstructions \u2013 of past climatic conditions. Ongoing reanalyses will be able to provide information about the climate 1,000 years back in time. In addition to data from satellites and recent direct measurements, data from core samples, tree rings, pollen, and plankton deposits are used. Such retrospectives in time help us to understand natural climate variations and to find other influencing factors. Reanalyses can also be used to improve climate models, which in turn will improve the quality of climate projections.<\/p>\n

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For more information, contact research leader Fran\u00e7ois Counillon<\/strong><\/a>.<\/p>\n<\/div>[\/vc_column][vc_column width=”1\/6″][\/vc_column][\/vc_row][\/vc_section][vc_row][vc_column]

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Software<\/h2><\/div>
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For access to NorCPM, a tool for producing climate predictions and reanalyses, go to the NorCPM-info page<\/a><\/span> for information. All the code to run the system is available on GitHub. Access is private, so request an account to gain access.<\/p><\/div>\t<\/div><\/div>[\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

[vc_section css=”.vc_custom_1669014075681{background-color: #ffffff !important;}” el_class=”full-image”][vc_row][vc_column][\/vc_column][\/vc_row][vc_row][vc_column width=”1\/6″][\/vc_column][vc_column width=”2\/3″][vc_column_text css=””] To make the models as reliable as possible, data assimilation is used, a method for transferring observations of various variables into mathematical models. We create reanalyses \u2013 reconstructions \u2013 of past climatic conditions. Ongoing reanalyses will be able to provide information about the climate 1,000 years back […]<\/p>\n","protected":false},"author":4,"featured_media":0,"parent":4241,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","footnotes":""},"class_list":["post-4249","page","type-page","status-publish","hentry"],"acf":[],"publishpress_future_action":{"enabled":false,"date":"2026-04-23 10:20:16","action":"change-status","newStatus":"draft","terms":[],"taxonomy":"translation_priority","extraData":[]},"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/nersc.no\/en\/wp-json\/wp\/v2\/pages\/4249","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nersc.no\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/nersc.no\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/nersc.no\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/nersc.no\/en\/wp-json\/wp\/v2\/comments?post=4249"}],"version-history":[{"count":6,"href":"https:\/\/nersc.no\/en\/wp-json\/wp\/v2\/pages\/4249\/revisions"}],"predecessor-version":[{"id":8165,"href":"https:\/\/nersc.no\/en\/wp-json\/wp\/v2\/pages\/4249\/revisions\/8165"}],"up":[{"embeddable":true,"href":"https:\/\/nersc.no\/en\/wp-json\/wp\/v2\/pages\/4241"}],"wp:attachment":[{"href":"https:\/\/nersc.no\/en\/wp-json\/wp\/v2\/media?parent=4249"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}