Climate Change

New York City's Special Initiative for Rebuilding and Resilience: Strengths and Limitations of Climate Model-Based Approaches

Radley Horton from Columbia University Earth Institute will speak on climate projections for New York City.  The $20 billion Special Initiative for Rebuilding and Resiliency (SIRR) Plan for New York is grounded upon climate risk information provided by the New York City Panel on Climate Change (NPCC). This expert panel, tasked with advising the City on climate-related issues, completed a ‘rapid response’ climate assessment with updated climate projections.

Going Local: Making Climate Assessments More Relevant for Decision Makers In New England

Cameron Wake is a research associate professor in climatology at the Institute for the Study of Earth, Oceans and Space at the University of New Hampshire.  He also has a joint appointment in the UNH Department of Earth Sciences and is the Josephine A. Lamprey Fellow in Climate and Sustainability at the UNH Sustainability Institute.

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.

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.

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.

Increase in the range between wet and dry season precipitation

A simple thermodynamic argument suggests that as the water vapor content of the atmosphere increases with global warming dry regions may become drier and wet regions wetter. This enhanced hydrological contrast with global warming can be attributed to changes in the atmospheric water vapor concentration being comparatively larger than those of the moisture advecting winds in the lower atmosphere.

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