July 19, 2014

11:10 AM | CO2 emissions drive heatwaves on despite warming ‘hiatus’
Direct effects from greenhouse gases are playing a significant role in making hot Northern Hemisphere summers more common even as average temperature increases slow down, find Youichi Kamae from the National Institute for Environmental Studies in Japan and his colleagues.

Kamae, Y., Shiogama, H., Watanabe, M. & Kimoto, M. (2014). Attributing the increase in Northern Hemisphere hot summers since the late 20th century, Geophysical Research Letters, DOI: 10.1002/2014GL061062


July 12, 2014

10:50 AM | Could climate’s crop impact catch us with our plants down?
Global warming has sharply increased the odds of serious problems because of declining harvests, find David Lobell from and Claudia Tebaldi from NCAR, and though that situation remains fairly unlikely, they advise countries to prepare for it.

Lobell, D. & Tebaldi, C. (2014). Getting caught with our plants down: the risks of a global crop yield slowdown from climate trends in the next two decades, Environmental Research Letters, 9 (7) 74003. DOI: 10.1088/1748-9326/9/7/074003

Mora, C., Frazier, A., Longman, R., Dacks, R., Walton, M., Tong, E., Sanchez, J., Kaiser, L., Stender, Y., Anderson, J. & Ambrosino, C. (2013). The projected timing of climate departure from recent variability, Nature, 502 (7470) 183-187. DOI: 10.1038/nature12540

Hawkins, E., Anderson, B., Diffenbaugh, N., Mahlstein, I., Betts, R., Hegerl, G., Joshi, M., Knutti, R., McNeall, D., Solomon, S. & Sutton, R. (2014). Uncertainties in the timing of unprecedented climates, Nature, 511 (7507) DOI: 10.1038/nature13523


July 05, 2014

11:12 AM | Who can afford to hold back rising seas?
Though using dikes to protect the world from rising sea levels will generally make economic sense, explains Jochen Hinkel from the Global Climate Forum, poor countries may not have the resources to do so.

Hinkel, J., Lincke, D., Vafeidis, A., Perrette, M., Nicholls, R., Tol, R., Marzeion, B., Fettweis, X., Ionescu, C. & Levermann, A. & (2014). Coastal flood damage and adaptation costs under 21st century sea-level rise, Proceedings of the National Academy of Sciences, 111 (9) 3292-3297. DOI: 10.1073/pnas.1222469111


June 28, 2014

6:03 AM | Shrinking dairy’s carbon hoofprint
As the world’s appetite for dairy produce grows along with its population so too will emissions of the greenhouse gas methane from cow guts – but US dairy industry consultant Joanne Knapp and her team have found that measures including more intensive farming and ensuring healthy herds can offset a lot of this.

Knapp, J., Laur, G., Vadas, P., Weiss, W. & Tricarico, J. (2014). Invited review: Enteric methane in dairy cattle production: Quantifying the opportunities and impact of reducing emissions, Journal of Dairy Science, 97 (6) 3231-3261. DOI: 10.3168/jds.2013-7234

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