Global Warming

Advances in Global Climate and Atmospheric Modeling: Perspectives from Yale and Todai

Nadine Unger of Yale’s presentation on “Land Use Impacts on Chemistry-Climate Interactions” (Nadine Unger, Yale) is one of five talks from the symposium that you can still enjoy here.

Researchers from Tokyo’s Todai University and Yale climate scientists made up a 5-person forum that included talks on a variety of climate science topics Friday, September 21, at Kroon Hall.  Featured talks included:

The Future of New England's Climate, with Senator Murphy

Senator Murphy’s address, with presentations from speakers and questions and answers from the audience.

How will global warming affect New England in the 21st century and how is the region preparing for the coming changes? On September 13th Yale Climate & Energy Institute hosted a town hall meeting on these questions, featuring short talks by climate and infrastructure experts and a panel discussion with Senator Chris Murphy (D, CT).

Robust direct effect of carbon dioxide on tropical circulation and regional precipitation

Global warming simulations suggest that wet regions (where precipitation exceeds evaporation) will become wetter and dry regions drier by the end of the 21st century (e.g., Held and Soden 2006), with larger contrasts expected between dry and wet seasons (Chou et al., 2013). This ‘rich-get-richer’ behavior is consistent with a large increase in the moisture content of atmosphere, leading to enhanced horizontal moisture fluxes across regions.

When Crocodiles Roamed the Poles

(CNN) Most of us can appreciate that the world is an ancient place and that a lot has changed in the almost 4.6 billion years since it took its shape.

It’s not easy to have a feel for the amount of time that has passed, but grappling with deep time helps you understand why an atmospheric carbon dioxide concentration (CO2) of 400 parts per million (ppm) is meaningful.

Deep time is geologic time and the scale needed to fathom the evolution of life, mountains, oceans, and Earth’s climate.

Regional Climate Change Assessment for the Next 100 years: Impacts, Mitigation, and Adaptation

The American Security Project (2011) report estimates that failure to address climate change could result in a $22 billion hit in GDP and nearly 100,000 jobs lost in New England between 2010 and 2050. Some of the projected impacts of climate change, such as warmer temperatures, faster than global-average sea level rise, and erratic changes in precipitation and extreme events (such as hurricanes and snowfall events), are already being felt in New England.

Subpolar gyres at the end of the 21st century

Subpolar ocean gyres (large systems of rotating ocean currents) in the Southern Hemisphere are found poleward of the Antarctic Circumpolar Current near the Weddell and Ross Sea. They play a key role in the global energy and water budgets. These gyres are crucial for the transport of heat around the planet, as well as the distribution of nutrients and marine species. Thus, the subpolar gyres are important in the mixing and transformation of water masses. In a recent study, Dr.

400 ppm of CO2: How will sea-level respond?

We are currently on the eve of a world with ~400 parts per million (ppm) of atmospheric carbon dioxide (398.35 ppm as of May 2nd, Mauna Loa Observatory). How global climate, sea-level and ecosystems will respond to this level of CO2 level is a key question for global change research. Recently, Foster and Rohling (2013) looked back into Earth’s geological history to explore the relationship between atmospheric CO2 and global sea-level.

Detecting ozone- and greenhouse gas-driven wind trends with observational data

Earth’s climate is characterized by persistent westerly jets (eastward flow) in the upper troposphere, located in the mid-latitudes of the Northern and Southern Hemisphere, which are associated locally with strong weather systems. The location of these jets is of paramount importance to human societies, as these are collocated with maximum in precipitation rates and surface winds in the extratropical regions.

Challenges of monitoring carbon dioxide in the subsurface

Large-scale carbon sequestration involves capturing carbon dioxide emitted from power plants and injecting it into underground reservoirs for long-term storage. Leakage from these storage reservoirs could lead to groundwater contamination, requiring that the spread of CO2 be monitored during and after injection. Seismic surveys are one key monitoring tool, but inferring the distribution CO2 deep in the subsurface from seismic reflection data can be very challenging.


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