--- attributes: ~ caption: 'Changes in the temperature of the Northern Hemisphere from surface observations (in red) and from proxies (in black; uncertainty range represented by shading) relative to 1961-1990 average temperature. These analyses suggest that current temperatures are higher than seen globally in at least the last 1700 years and that the last decade (2001 to 2010) was the warmest decade on record. (Figure source: adapted from Mann et al. 20084).' chapter: doi: 10.7930/J0G15XS3 identifier: appendix-faqs number: 34 report_identifier: nca3 sort_key: 340 title: 'Appendix 4: Frequently Asked Questions' url: http://nca2014.globalchange.gov/report/appendices/faqs chapter_identifier: appendix-faqs cited_by: [] contributors: - href: https://data.globalchange.gov/contributor/3758.yaml id: 3758 organization: country_code: US identifier: texas-tech-university international: ~ name: Texas Tech University organization_type_identifier: academic url: http://www.ttu.edu organization_uri: /organization/texas-tech-university person: first_name: Katharine id: 1024 last_name: Hayhoe middle_name: ~ orcid: 0000-0003-3625-1402 url: http://www.katharinehayhoe.com/ person_id: 1024 person_uri: /person/1024 role_type_identifier: scientist uri: /contributor/3758 create_dt: 2013-10-24T15:50:00 files: - file: 77/92/d1d3c118800deb17639222551e17/caq_global_temperature_proxy_data_v6.png href: https://data.globalchange.gov/assets/77/92/d1d3c118800deb17639222551e17/caq_global_temperature_proxy_data_v6.png identifier: 7e36fefb-8e49-4641-9fbf-7ea0d6bea5ef landing_page: ~ location: ~ mime_type: image/png sha1: 56d9f318a4d9abe86798e1dc1767fa98c42c473a size: 242365 thumbnail: 77/92/d1d3c118800deb17639222551e17/.thumb-7e36fefb-8e49-4641-9fbf-7ea0d6bea5ef.png thumbnail_href: https://data.globalchange.gov/assets/77/92/d1d3c118800deb17639222551e17/.thumb-7e36fefb-8e49-4641-9fbf-7ea0d6bea5ef.png uri: /file/7e36fefb-8e49-4641-9fbf-7ea0d6bea5ef url: /assets/77/92/d1d3c118800deb17639222551e17/caq_global_temperature_proxy_data_v6.png gcmd_keywords: [] href: https://data.globalchange.gov/report/nca3/chapter/appendix-faqs/figure/caq-1700-years-of-global-temperature-from-proxy-data.yaml identifier: caq-1700-years-of-global-temperature-from-proxy-data images: - attributes: ~ create_dt: 2013-10-24T15:50:00 description: ~ identifier: fb33b08b-9e61-4bfd-a26a-1bcd615994eb lat_max: ~ lat_min: ~ lon_max: ~ lon_min: ~ position: ~ submission_dt: ~ time_end: 2006-12-31T23:59:59 time_start: 0300-01-01T00:00:00 title: 1700 Years of Temperature Change from Proxy Data url: ~ usage_limits: ~ kindred_figures: [] lat_max: ~ lat_min: ~ lon_max: ~ lon_min: ~ ordinal: 5 parents: [] references: [] regions: [] report_identifier: nca3 source_citation: ~ submission_dt: ~ time_end: ~ time_start: ~ title: 1700 Years of Temperature from Proxy Data uri: /report/nca3/chapter/appendix-faqs/figure/caq-1700-years-of-global-temperature-from-proxy-data url: http://nca2014.globalchange.gov/report/appendices/faqs/graphics/1700-years-temperature-change-proxy-data usage_limits: Copyright protected. Obtain permission from the original figure source.