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The blue line represents global surface temperature reconstructed over the last 2,000 years using proxy data from tree rings, corals, and ice cores. [1] The red line shows direct surface temperature measurements since 1880. [2] Global surface temperature (GST) is the average temperature of Earth's surface.
According to IPCC Sixth Assessment Report, in the last 170 years, humans have caused the global temperature to increase to the highest level in the last 2,000 years. The current multi-century period is the warmest in the past 100,000 years. [3] The temperature in the years 2011-2020 was 1.09 °C higher than in 1859–1890.
Top chart: Earth's climate has cycled between ice ages and warm interglacial periods, with each cycle taking tens of thousands of years or more. Middle chart: Global average temperature was in a cooling trend for thousands of years before fossil fuel based industrialization. Since then, it has increased about a full 1°C—in a time period less ...
Hockey stick graphs present the global or hemispherical mean temperature record of the past 500 to 2000 years as shown by quantitative climate reconstructions based on climate proxy records. These reconstructions have consistently shown a slow long term cooling trend changing into relatively rapid warming in the 20th century, with the ...
800,000-, 2,000-, 139-year global average temperature —— Further includes an 800,000 year chart Temperature reconstruction last two millennia —— source of top chart 20190727 COMPARE warming stripes - Global vs Caribbean 1910-2018 (ref 1910-2000) —— top warming stripes graphic (global) uses same data (NOAA) as the bottom chart
There is good agreement on the overall evolution of global temperatures and year-to-year variability. Dataset anomalies are calculated relative to a 1981 to 2010 baseline and offset by 0.69°C, which is the best estimate difference for that period from the 1850-1900 average given in the IPCC sixth assessment report."
Plant And Animal Habitats Face Dire Threat From Warming Climate. Each year, more species are losing their habitats to climate change. An increase of 4 degrees Celsius in average planetary temperatures could result in severe habitat loss for almost two-thirds of plant species and one-third of mammal species. +2 degrees +4 degrees
Date: 20 March 2020: Source: Own work: Author: RCraig09: Other versions: Common Era Temperature.svg — — — — — uploaded by Efbrazil, based on an earlier chart by Femkemilene Temperature reconstruction last two millennia.svg — — — — — Femkemilene's original chart Global Temperature Anomaly.svg — — — — — widely used chart