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Analysis of Greenland Ice Cores Adds to Historical Record and May Provide Glimpse into Climate’s Future

By Guest PostJanuary 30, 2013Environmentalpine research, Antarctica, Arctic, arctic sciences section, atmosphere, belgium, boulder, canada, change, China, climate, climate conditions, denmark, dorthe dahl-jensen, earth climate, eemian interglacial, eemian like, eemian period, france, future, future climate, Germany, global temperatures rise, greenland ice cores, greenland ice sheet, historical record, ice ages, ice sheet, Iceland, Japan, jim white, last interglacial period, national science foundation, neem, northern greenland, northern hemisphere, paleo climate models, sea-level rise, south korea, subsurface ice layers, Sweden, switzerland, the netherlands, united kingdom, united states, university of colorado, university of copenhagen, west antarctic

The International North Greenland Eemian Ice Drilling (NEEM) project results indicate that melting of Antarctic ice sheet may have contributed more to sea level rise than melting of the Greeland ice sheet some 100,000 years ago

A new study that provides surprising details on changes in Earth’s climate from more than 100,000 years ago indicates that the last interglacial–the period between “ice ages”–was warmer than previously thought and may be a good analog for future climate, as greenhouse gases increase in the atmosphere and global temperatures rise.

The research findings also indicate that melting of the massive West Antarctic ice sheet may have contributed more to sea-level rise at that time than melting of the Greenland ice sheet. (more…)

Book Traces Long Trail of Global Warming Scholarship

By Guest PostSeptember 24, 2011Environmentcarbon dioxide concentrations in the atmosphere, carbon dioxide emissions, climate simulations, co2 data, computer simulations, crystalline substances, david archer, earth climate, foundations of global-warming science, geophysical sciences professor, global warming, global warming and climate change, global warming class, greenhouse effect, humans, impact on climate, infrared intensity of moonlight, louis block professor, methane hydrates, nobel laureate, oceanic sediments, ray pierrehumbert, rising temperatures, svante arrhenius, the smoking gun

Geophysical Sciences Professor David Archer polled the 200 students in one of his Global Warming classes about whether they believed that humans have had an impact on climate. Approximately 90 percent of the students responded “yes,” reflecting the lessons of climate simulations that Archer had shared earlier with the students.

Those computer simulations are able to reproduce the trend toward rising temperatures, but only when they include data on rising carbon dioxide concentrations in the atmosphere. Simulations that omit the CO2 data do not accurately reproduce the changes. Archer says the link helps reveal carbon dioxide emissions as “the smoking gun” behind global warming and climate change. (more…)

Newly Discovered Icelandic Current Could Change North Atlantic Climate Picture

By Guest PostAugust 22, 2011Environmentamoc, atlantic meridional overturning circulation, climate specialists, current, daniel j torres, denmark overflow, denmark strait overflow water, dsow, earth climate, east greenland current, equator, eric itsweire, future climate change, great ocean conveyor belt, greenland, greenland scotland ridge, Iceland, kjetil våge, michael a spall, national science foundation, nij, north icelandic jet, nsf, numerical model, ocean circulation system, ocean response to climate change, physical oceanographers, plumes, r v knorr, relationship between ocean circulation and climate, rise in global temperatures, robert s pickart, svein østerhus, warming related phenomena, whoi, woods hole oceanographic institution

An international team of researchers, including physical oceanographers from the Woods Hole Oceanographic Institution (WHOI), has confirmed the presence of a deep-reaching ocean circulation system off Iceland that could significantly influence the ocean’s response to climate change in previously unforeseen ways.

The current, called the North Icelandic Jet (NIJ), contributes to a key component of the Atlantic Meridional Overturning Circulation (AMOC), also known as the “great ocean conveyor belt,” which is critically important for regulating Earth’s climate. As part of the planet’s reciprocal relationship between ocean circulation and climate, this conveyor belt transports warm surface water to high latitudes where the water warms the air, then cools, sinks, and returns towards the equator as a deep flow. (more…)

NASA Mission Will Observe Earth’s Salty Seas

By Guest PostMay 18, 2011Scienceaquarius, aquarius sac d observatory, Argentina, atmosphere, california, climate, comision nacional de actividades espaciales, conae, conveyor belt, deep ocean, delta ii rocket, earth climate, gary lagerloef, melting of sea ice, NASA, ocean circulation, ocean surface salinity, polar regions, radiometer, river runoff, salinity, salinity variations, seattle, space agency, vandenberg air force base, water cycle

PASADENA, Calif. – Final preparations are under way for the June 9 launch of the international Aquarius/SAC-D observatory. The mission’s primary instrument, Aquarius, will study interactions between ocean circulation, the water cycle and climate by measuring ocean surface salinity.

Engineers at Vandenberg Air Force Base in California are performing final tests before mating Aquarius/SAC-D to its Delta II rocket. The mission is a collaboration between NASA and Argentina’s space agency, Comision Nacional de Actividades Espaciales (CONAE), with participation from Brazil, Canada, France and Italy. SAC stands for Satelite de Applicaciones Cientificas. Aquarius was built by NASA’s Jet Propulsion Laboratory in Pasadena, Calif., and the agency’s Goddard Space Flight Center in Greenbelt, Md. (more…)

Optimizing Climate Change Reduction

By Guest PostSeptember 18, 20101 commentEnvironment, Scienceaerosols, carnegie institution, carnegie institution for science, carnegie researchers, climate, computer model, earth climate, geoengineering ideas, george ban-weiss, global climate model, global ecology, global sunshade, global temperature, hydrological cycle, ken caldeira, runoff, solar radiation, stratosphere, sulfate, tropical regions, warming planet

Palo Alto, CA — Scientists at the Carnegie Institution’s Department of Global Ecology have taken a new approach on examining a proposal to fix the warming planet. So-called geoengineering ideas—large-scale projects to change the Earth’s climate—have included erecting giant mirrors in space to reflect solar radiation, injecting aerosols of sulfate into the stratosphere making a global sunshade, and much more. Past modeling of the sulfate idea looked at how the stratospheric aerosols might affect Earth’s climate and chemistry.

(more…)

Tag Archives: earth climate

Analysis of Greenland Ice Cores Adds to Historical Record and May Provide Glimpse into Climate’s Future

Book Traces Long Trail of Global Warming Scholarship

Newly Discovered Icelandic Current Could Change North Atlantic Climate Picture

NASA Mission Will Observe Earth’s Salty Seas

Optimizing Climate Change Reduction