COMMITTED CLIMATE CHANGE. Today's committed unavoidable (locked in) global warming, due to the atmospheric GHG levels and climate system inertia with long lag times, is several time today's global temperature increase. The ocean heat lag alone doubles today's warming.
UNPRECEDENTED RATE OF RADIATIVE FORCING (PLANETARY HEATING) AND OCEAN ACIDIFICATION INCREASE. This is due to the extreme rate of increase in atmospheric greenhouse gas levels - CO2 for ocean acidification. ARCTIC MELTDOWN. Rapid loss of Arctic albedo cooling as snow melts faster and summer sea ice collapses - a powerful amplifying feedback. The Arctic is warming up to 3-4 times faster than the rest of the planet melting snow and summer sea ice faster, which increases Arctic warming. The warming Arctic is emitting the powerful greenhouse gas methane as a feedback.
METHANE FEEDBACK - RUNAWAY Atmospheric methane is now increasing due to planetary methane feedback emissions. Methane has 72 X the warming effect of CO2 over 20 years. Arctic methane feedback combined with Arctic albedo cooling loss is the planetary catastrophe situation of runaway global warming. We are in that situation now.
EXTREME WEATHER. Today's rapidly increasing extreme weather events including heat waves droughts and floods are being driven by global warming. Extreme weather is the most damaging effect of global warming to crops as well as human populations.
WORLD FOOD SECURITY: NORTHERN HEMISPHERE SEVERE HEAT WAVES AND DROUGHTS ARE INCREASING. The world's best food producing regions are in the Northern hemisphere. Since 2000 extreme heat and drought have become more frequent in the NH. The best explanation for this is the combination of Arctic amplified warming adding to global warming, that is faster in the Northern hemisphere.
CLIMATE EMERGENCY INSTITUTE The Health and Human Rights Approach to Climate Change
HUMAN DYNAMICS OF CLIMATE CHANGE
ThE Human Dynamics of Climate Change map shows projections of climate change impacts and population change by the end of the 21st century in the context of the way we live today, without adaptation.
The central map shows information about present-day human dynamics, and the surrounding maps show some of the projections of climate change impacts and population change. The climate projections are taken from the latest generation of climate and impacts models, for the end of the century (2071—2100) relative to a 1981—2010 baseline, under a ‘business as usual’ greenhouse gas concentration scenario (RCP8.5).
The population change follows a ‘middle of the road’ socio-economic scenario (SSP2). The future change icons show the median change across the model runs in climatologically averaged regions, with the spatial pattern of mean change on the map behind. Each map shows an element of the information and so all the maps should be considered together.