All posts tagged: Climate Change

Time Magazine Interview on California Fires

I was recently interviewed by Time Magazine on the 2017 California wildfire season.  The combination of high precipitation in the winter promoting much fine fuel growth, the long period since last significant rainfall and the high summer temperatures being experiences in Southern California have produced a dangerous situation.  The main unknown in the equation is the frequency and timing of ignition sources. Let’s hope for the best. Read the Time article here – http://time.com/4838989/california-drought-wildfire-fire-season/ Advertisements

AAG Presidential Column – The Long, Hot Summer

The Long, Hot Summer Glen M. MacDonald October 5, 2016 The Long, Hot Summer2016-10-05T15:29:25+00:00 Featured News, President’s Column 0 Comments It has been a long, hot summer. In July, the National Aeronautics and Space Administration (NASA) released its analysis of global temperatures for the first six months of 2016. Each of these months has set a record for global temperatures. Taken together, this marks the warmest six-month period since the record began in 1880. The temperatures for the first half of 2016 were about 1.3o C warmer than the late 19th century average. This is not a trivial amount. Two weeks ago, the National Oceanic and Atmospheric Administration (NOAA) released its analysis of August 2016 temperatures and found that it marks the 16th straight month of record-breaking temperatures for the globe. California, where I am writing this, is really feeling the heat. High evapotranspiration rates have locked the state in a condition of severe to exceptional drought according to the U.S. Drought Monitor. My own research focuses upon long-term climatic change. For me, anomalously warm years …

International Press Coverage on Drought Study

Wow! Our drought study – MacDonald, G. M., Moser, K.A., Bloom, A. M., Potito, A.P., Porinchu, D.F., Holmquist, J.R., Hughes, J. and Kremenetski, K.V. 2016. Prolonged California aridity linked to climate warming and Pacific sea surface temperature. Nature.Com/Sci. Rep. 6, 33325;  http://www.nature.com/articles/srep33325 – garnered international press coverage in print, online, television and radio. It was really quite something.  The headlines and stories were a bit more sensational than our rather conservative wording in the actual article.  That being said – it is good idea at this time to consider that California and the West is likely to be more arid in the coming decades, from higher temperatures and evaporation rates if nothing else, and we should some serious thinking and planning. Hopefully this media attention will help get people thinking about these challenges in California and the Southwest.  The thing that worries me is that although we might be able to develop engineering and conservation strategies for the water applied to our farms and cities, we will not be able to irrigate the vast areas …

New Study on Drought by MacDonald Lab

I was the lead author on a new study of California drought based on using lake sediment records from the Sierra Nevada to look at how past climate warming has impacted the Pacific Ocean and California hydroclimate. This work took many years and was a real team effort between the MacDonald Lab’s graduate students and post-docs and Professor Katrina Moser and her team from the University of Western Ontario in Canada. Just like the stock market, past performance does not predict the future, but it can provide insights into what might occur with continued warming.   The article was published in Nature.com/Scientific Reports and is freely available to read and download at the Nature.com site – MacDonald, G. M., Moser, K.A., Bloom, A. M., Potito, A.P., Porinchu, D.F., Holmquist, J.R., Hughes, J. and Kremenetski, K.V. 2016. Prolonged California aridity linked to climate warming and Pacific sea surface temperature. Nature.Com/Sci. Rep. 6, 33325; http://www.nature.com/articles/srep33325 Below is the Abstract for the article – Abstract California has experienced a dry 21st century capped by severe drought from 2012 through …