By Keyvan Malek, Civil and Environmental Engineering at Cornell University
In an earlier AgClimate.net article I discussed studies that have looked into the effects of investments in efficient irrigation technology on other water-related sectors. I argued that many studies have concluded that such investments might have negative implications for other water users, such as farmers or energy producers. I also mentioned that we were studying this issue, and promised to report our findings. This article and our soon-to-be-published paper deliver on that promise.
Why we did what we did
Questions still remain around the impacts across a basin and for multiple water use sectors of more efficient irrigation systems, such as drip irrigation. Photo: Joby Elliott under CC BY 2.0.
Among agro-hydrologists—people who study the dynamics of water in agricultural systems—it is a widely accepted fact that one farmer’s investment in new, irrigation efficiency technologies negatively affects other farmers and sectors. However, questions remain, as past studies have not explicitly quantified the impacts of new irrigation systems on other sectors. What is the implication for overall agricultural productivity? How do efficient systems impact the ecological condition of the basin? How do energy production and demand change as people switch to more efficient systems? Are there any social implications? And do these productivity, ecological, and social implications change as the climate changes? Continue reading
By Chris Schnepf
Halofsky, Jessica E.; Peterson, David L.; Dante-Wood, S. Karen; Hoang, Linh; Ho, Joanne J.; Joyce, Linda A., eds. 2018. Climate change vulnerability and adaptation in the Northern Rocky Mountains (Parts 1 and 2). Gen. Tech. Rep. RMRS-GTR-374. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station.
Foresters were among the first to start thinking about the possible effects of climate change, in part because of the long-term nature of forests—foresters commonly reflect on management issues on 50 or even 150-year time scales. Because forests are also highly valued for other benefits in addition to commodity production (i.e., wood), those managing forests are also particularly aware of the long-term effects of their management on water, wildlife, soil, and other ecosystem benefits.
One of the best examples of that broad, long, view is a recent new publication titled “Climate Change Vulnerability and Adaptation in the Northern Rocky Mountains,” a two-part, 495-page document produced by the USDA Forest Service). The publication is the result of a process that had extensive involvement from Forest Service personnel, non-governmental partners, and universities in a series of 2- and 3-day workshops throughout the Northern Region of the Forest Service (including one in Coeur d’Alene, Idaho). Continue reading
By Chris Schnepf
“Nature’s Notebook” is an app that can be used to collect phenology data such as flower timing. Photo: C. Schnepf.
Trying to understand how climate is changing, and how these changes affect the crop yields, forest growth, water from melting snowpacks, and all the other parts of our natural world, is very challenging. Increasingly, some of the primary tools for understanding these phenomena are models.
One of the biggest misconceptions about models is the idea they are not based in the real world – that they are just theoretical constructs, untethered to actual measurements. There are models like that – even philosophers are playing with models these days. But most of the models used in the natural sciences depend on empirical data – measurements of things like temperature, precipitation, crop yields, tree mortality, and many other attributes. Continue reading
By Sonia A. Hall
Irrigated pasture in Blaine County, Idaho. Water demand for irrigation is expected to start earlier in the season as the climate changes. Photo: Mark Goebel under CC BY 2.0.
Turns out that understanding how changes in climate are affecting the demand for water for irrigation in the Columbia River Basin is really important for our overall understanding of how water use and management may need to change in the future. Check out this Washington State University newsletter article on a recent study into this topic, led by AgClimate’s sometime-contributor Kirti Rajagopalan.
Rajagopalan, K., Chinnayakanahalli, K.J., Stockle, C.O., Nelson, R.L., Kruger, C.E., Brady, M.P., Malek, K., Dinesh, S.T., Barber, M.E., Hamlet, A.F. and Yorgey, G.G., 2018. Impacts of Near‐Term Climate Change on Irrigation Demands and Crop Yields in the Columbia River Basin. Water Resources Research, 54(3), pp.2152-2182. https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2017WR020954
By Sonia A. Hall
Landscapes west and east of the 100th meridian. Left: Rangeland country in Idaho. Photo: Sonia A. Hall. Right: Soybean crops in Iowa. Photo: Parshotam Lal Tandon, under CC BY-NC-SA 2.0.
The contrast between the arid west—rangelands, wheat, conifer forests, irrigated agriculture—and the Midwest’s Great Plains—corn, soybean, prairies—is well known. There is a somewhat abrupt line separating arid from humid, close to the 100th meridian. That line is now shifting, as climate change affects temperatures, precipitation, and wind patterns that control that arid-to-humid line. Take a look at a recent study from Columbia University on how the line is shifting eastward from the 100th meridian. And you might want to start with the blog article “The 100th Meridian, Where the Great Plains Begin, May Be Shifting.”
Seager, R., N. Lis, J. Feldman, M. Ting, A.P. Williams, J. Nakamura, H. Liu, and N. Henderson, 2018: Whither the 100th Meridian? The Once and Future Physical and Human Geography of America’s Arid–Humid Divide. Part I: The Story So Far. Earth Interact., 22, 1–22, https://doi.org/10.1175/EI-D-17-0011.1
Seager, R., J. Feldman, N. Lis, M. Ting, A.P. Williams, J. Nakamura, H. Liu, and N. Henderson, 2018: Whither the 100th Meridian? The Once and Future Physical and Human Geography of America’s Arid–Humid Divide. Part II: The Meridian Moves East. Earth Interact., 22, 1–24, https://doi.org/10.1175/EI-D-17-0012.1
Beginning Thursday, July 12 at 9:00 am Pacific Standard Time – and occurring weekly at that time through Tuesday, August 28 – the OneNOAA seminar series will be hosting an 8-part suite of talks on different aspects of the National Climate Assessment 4 Volume I – the Climate Science Special Report. This is a fantastic opportunity to learn about the latest climate science from some of the nation’s most eminent scientists!
- Thurs, July 12: Climate Science: What’s New? – Katharine Hayhoe (Texas Tech University)
- Thurs, July 19: Detection and Attribution of Climate Change from the CSSR – U.S. Perspective – Tom Knutson (NOAA-GFDL)
- Thurs, July 26: Droughts, Floods, and Wildfire – Michael Wehner (DOE-LBNL)
- Thurs, Aug 2: Climate Potential Surprises – Compound Extremes and Tipping Elements – Radley Horton (Columbia University / Lamont-Doherty Earth Observatory)
- Thurs, Aug 9: Climate Long-Term Climate Mitigation Perspectives and the 2°C Objective – Ben DeAngelo (NOAA)
- Thurs, Aug 16: The Causes and Consequences of a Rapidly Changing Arctic – Patrick Taylor (NASA-Langley Research Center)
- Thurs, Aug 23: Climate Tidings of the Tides – Billy Sweet (NOAA)
- Tues, Aug 28: The Fourth U.S. National Climate Assessment: An Overview of Volume 1 – Don Wuebbles (University of Illinois)
by Sonia A. Hall
Yes, more on snow… because there’s less snow. Read Nathan Gilles’s article in the Climate CIRCulator, that discusses research that found that mountains in the western United States have seen snowpack decreasing by an amount similar to the size of Lake Mead over the last 60 years.
by Sonia A. Hall
Remember 2015? That was a snow drought. Since then, researchers at CIRC (Climate Impacts Research Consortium) have been delving into snow droughts. They are part of an effort that recently released “a number of snow drought monitoring tools designed for decision makers and resource managers to monitor, plan for, and cope with snow drought and its impacts.” Get more details through Christina Stone (NIDIS) and Nathan Gilles’s article in the Climate CIRCulator, or check it out for yourself on the Snow Drought website.
by Sonia A. Hall
Interested in better understanding climate change impacts in the Pacific Northwest? Our colleagues at CIRC (Climate Impacts Research Consortium) have recently released a report on their first seven years of research. Check out Nathan Gilles’s article on this report, that walks you through and highlights the key findings. Read Nathan’s article in the Climate CIRCulator.
By: Lauren Parker
Could Northwest growers have an opportunity to cultivate potentially displaced California almonds in the future? Photo: Flickr user Nicholas D under CC BY-NC 2.0.
California cultivates roughly two-thirds of the nation’s fruit and nut crops, including virtually 100% of the US almond supply. Growing demand and high profit-per-acre have driven a doubling in almond acreage in the Golden State since 1995, including a nearly 100,000-acre increase in almond plantations between 2011 and 2015, despite that period coinciding with the most severe drought in the state in a millennium.