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COMMUNITY NOTEBOOK

Coping with Climate Change in the Hudson Valley story and photos by Hillary Harvey

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n the heart of the Hudson Valley courses a beautiful vulnerability. Named by various Native American tribes “the water that flows two ways,” the Hudson River is an estuary, created by fresh water flowing down from the Adirondacks and water being drawn up by the tides from the Atlantic Ocean. In this mix an extremely delicate intertidal zone is formed. There exists the rise and fall of the tide in a fresh water environment, which creates a unique set of ecological conditions. With predicted changes in tidal levels, temperature and climatic conditions, as is expected with global warming, there are many who anticipate changes in those river environments. GETTING HEATED Back in the 1990s, Doug Burns, a scientist with the US Geological Survey, began to wonder about climate and its affects on local ecology. In a study published last year in the Journal of Hydrology, Burns and his colleagues found that the climate has warmed by just over a degree Celsius since the 1950s. Their highest elevation site, Slide Mountain (4,180 feet), showed the most warming of any climate station in the Catskills. So the snowpack, which is where much of the runoff in spring comes from, is affected. In fact, peak snowmelt is now five days earlier than in the past. If that warming trend persists, Burns anticipates a long-term water resource concern. The premature snowmelt already causes reservoirs to be at greater capacity in the beginning of winter and to fill earlier in the spring. Full reservoirs cause flooding as excessive precipitation overflows. Then, because the precipitation was not caught and stored, there is less in the reservoir later in the season. Paul Huth has been recording weather at Mohonk Preserve’s Daniel Smiley Research Center for the past 34 years. Originally established in 1896 by 34 COMMUNITY NOTEBOOK CHRONOGRAM 4/08

the US Weather Bureau (now the National Weather Service), the center is beginning to work with the Lamont-Doherty Earth Observatory at Columbia University to examine 113 years of data and determine trends. Huth, the center’s director of research, said they have a rough handle on what they expect to find. Since 1896 there has been a 2.2 degree increase in overall temperature, and with their observations of seasonal changes in plants and animals—such as flowering, fruiting, migration, and singing—they have noticed changes correlating to climate. They observed that six formerly migratory bird species, including the robin, the song sparrow, and the turkey vulture, are now over-wintering in the region. In the last 25 years, they noticed the black vulture, a bird never previously seen in this region, staying in flocks in New Paltz. Huth also mentioned Bloodroot, a spring ephemeral plant, which is blooming 14 days earlier than it did in the 1930s. In interviews, Burns and others cited reports by the Union of Concerned Scientists, noting that both national and international scientists are reiterating the fact that boosts to temperature and precipitation are accelerating faster in the past 30 years as compared to the past 100. More and more studies are connecting warmer climate with sea level rise, predicting an upsurge as glacial ice melts. THE SURGE Because beaches emerge from their waters at narrow angles, storms that occur at a higher sea level will be harsher. “If the sea level goes up a foot,” Burns said, “it doesn’t mean that the storm surge will go inland a foot more. It’ll go inland many feet more.” Even in the case of the Hudson, with both beaches and steep embankments, this presents a problem because of the responsiveness of the river to storm surge. Storms are only expected to become more

Chronogram - April 2008  
Chronogram - April 2008  

A regional magazine dedicated to stimulating and supporting the creative and cultural life of New York's beautiful Hudson Valley. - April 20...

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