In the News: Global warming felt to deepest reaches of ocean

Our very own Jaime Palter and Casimir de Lavergne are making waves with a new article titled Cessation of deep convection in the open Southern Ocean under anthropogenic climate change.

Read more about it in the McGill NewsRoom.

Seminar: Joowan Kim

Please join us tomorrow, Wednesday at 14:35 in Burnside 934 for a student seminar by Joowan Kim. Abstract is as follows:

 

Climatology of ERA-Interim and ensemble of CMIP5 models.

Annual-mean climatology (1979-2005) of 100-hPa temperature from a) ERA-Interim and b) ensemble of CMIP5 models. White contours denote OLR from observation and model ensemble respectively. c) Taylor diagram of the temperature field within 15S-15N for individual models (open and closed circles) and their ensemble (cross).

Thermal characteristics of the tropical tropopause layer in CMIP5 models: historical simulations

The climatology and variability of temperatures in the tropical tropopause layer are investigated in 16 Coupled Model Intercomparison Project Phase 5 (CMIP5) models for historical simulations. The climatology of 100-hPa temperatures compare well with ERA-Interim reanalysis. The models possess reasonable temperature minima in the deep tropics, but some models also have a warm bias or a bias in the location of the temperature minima. The CMIP5 models generally capture the phase of the seasonal cycle in 100-hPa temperatures, but the amplitude of the seasonal cycle varies greatly among models. The interannual variability in 100-hPa temperature is associated with the El Niño-Southern Oscillation (ENSO) and volcanic forcing in observation and CMIP5 models. Most of models successfully capture the ENSO-related large scale response, but the response to volcanic forcing is overestimated in many models. On intraseasonal timescales, observed and modeled variability is dominated by equatorial waves (Kelvin, inertio-gravity, and mixed Rossby-gravity waves) and the Madden-Julian Oscillation (MJO). Most models show variability related to the equatorial waves, but significant biases are found in the phase speeds of the waves when compared to ERA-Interim. The MJO signature is weak and non-distinguishable from the Kelvin wave power in most CMIP5 models.

Student Seminar: Melissa Gervais

Please join us tomorrow in Burnside 934 at 14:35 for a student seminar by Melissa Gervais. Abstract follows.

How Well is the Distribution of Precipitation Represented? Part I: Impacts of Station Density and Resolution Changes on Gridded Station Data

Precipitation is one of the most important variables to predict in future climate change owing to the socio-economic implications for water resources. However, it has historically been a very challenging variable for climate models to predict. Newer versions of Community Climate System Model (CCSM) from the National Center for Atmospheric Research (NCAR) have seen great improvements in their representation of the distribution of precipitation, with results now very close to observations (Gent 2011). The accuracy of precipitation observations used to validate the GCM output is thus becoming increasingly important. Results will be presented from the first of two studies on examining the ability of observations, reanalysis, the CCSM4 fully coupled model, and the NCAR Community Atmosphere Model (CAM5), to represent the distribution of precipitation. Here, we focus on the accuracy of interpolating station data in terms of the method of interpolation and the station density.

Station data from the Global Historical Climatology Network – Daily Version 1.0, within the United States, will be used to create and test gridded precipitation products. The goal is firstly to examine what the impact of gridding station data is on the precipitation statistics and whether the gridding method used is important. Secondly, an experiment will be conducted to determine how dense an observation network needs to be, in different climatic regions, in order to produce an accurate distribution of precipitation. This allows us to identify regions where station density is not high enough to trust the gridded precipitation data for validating GCMs.

Geospectives Seminar: Dr. Ashlee Cunsolo Willox

Dr. Ashlee Cunsolo Willox, Department of Geography, McGill University

The Department of Geography is happy to announce that they are kicking off the fall semester with an exciting series of talks as part of this year’s GeoSpectives Seminar Series, a ~bi-weekly lecture series hosted by the Department of Geography.

This semester GeoSpectives talks will take place on Friday afternoons from 3:00-4:30pm in Burnside Hall room 426. For the full full schedule, please see GeoSpectives Poster Fall 2012. We will be sending out reminders for upcoming talks throughout the semester.

Our first GeoSpectives will take place next Friday Sept 14th @ 3pm in Burnside Hall rm 426 by Dr. Ashlee Cunsolo Willox on:

Climate Change and Inuit Mental Health: Local Voices, Global Implications

Anthropogenic climate change has become an increasing international concern, as peoples globally are already experiencing dramatic shifts in weather, climate, and environment. These changes are adversely impacting human health, with some scholars identifying climate change as the most significant threat to global health of the 21st Century. Emerging research indicates that climate change, and the resulting environmental alterations, also pose serious challenges for mental health and well-being, particularly among resource-dependent regions, those living in rural, remote, or ecologically-sensitive areas, and Indigenous populations. Drawing on data from community-led research conducted in the Inuit community of Rigolet, Nunatsiavut, Labrador, this presentation will describe the pathways through which residents reported that climate change was negatively impacting mental health and health systems in the region, and highlight the need to work collaboratively with communities and regions to define research priorities, develop locally-appropriate mental health services, and design culturally-relevant adaptation strategies.

Blog authors are solely responsible for the content of the blogs listed in the directory. Neither the content of these blogs, nor the links to other web sites, are screened, approved, reviewed or endorsed by McGill University. The text and other material on these blogs are the opinion of the specific author and are not statements of advice, opinion, or information of McGill.