Old News
NEWS! (2018/4/29)
Our paper published last year (Kobashi et al., 2017) was selected in "Top 100 of Earth Science 2017" of Scientific Reports! Check out 76-100 section.
NEWS! (2018/3/8)
Correction on the Supplementary Data (Kobashi et al., 2017) has been published in Scientific Reports.
https://www.nature.com/articles/s41598-018-21307-y
NEWS! (2017/7/29)
Message 2 from Takuro Kobashi: Possibility of abrupt warming in Greenland near future
As mentioned below, Greenland has not been warmed as much as Northern Hemispheric temperature during the past decades. In our recent paper (Kobashi et al., 2017), we found that the effect of changing solar activity on Greenland temperature (when solar activity is stronger, Greenland cools, or vice versa) persisted through the past 11,500 years. Interestingly, abrupt climate changes in the early Holocene may also be related to the variable solar activity (see supplementary figure 9 of the paper). In the past, when Greenland temperature delayed from hemispheric-wide climate changes, often the Greenland temperature rapidly adjusts to the hemispheric trend likely related to a rapid start-up of ocean currents. Now, hemispheric temperature has been rising, but Greenland temperature has stayed relatively low. The next adjustment (6-8 C) of the Greenland temperature might be also quite rapid, say in a few years. We know it when Greenland temperature experiences rapid warmings, hemispheric wide climate changes also occur. The climate change may disturb human activities (e.g., agriculture) in wide-spread areas.
NEWS! (2017/7/27)
Message 1 from Takuro Kobashi: In the paper we published in May (Kobashi et al., 2017), we have shown that Greenland (Summit and southwest) has been cooling over the past decade. In our earlier paper, we have also shown that this cooling is a cascading effect of the stronger solar activity of the late 20th century likely by slowing down of ocean currents (Kobashi et al., 2015). The effect of solar activity on Greenland delays about 20-30 years by the ocean response. Therefore, the effect of current weaker solar activity since around 2000 will appear in Greenland about 10 years later from today. Indeed, we have been quite lucky not to see warming in Greenland because of the late 20th century solar maximum. However, the lucky will end soon. Greenland probably will start warming quite rapidly inducing melting of the ice-sheet in a decade or so. Greenland warms about 3-4 times more than Northern Hemispheric average temperature (Kobashi et al., 2013). So, if global temperature increase by 2 C, Greenland will experience 6-8 C warming! We already put enough CO2 into the atmosphere. We have now a path to use solar and wind energies instead of fossil fuels. No need to harm nature anymore! Speed up the process of decarbonization! (July 27, 2017)
NEWS! (2017/5/3)
Project Completed
The final paper has been published. This completes the Greenland temperature project.
Kobashi, T., L. Menviel, A. Jeltsch-Thömmes, B. M. Vinther, J. E. Box, R. Muscheler, T. Nakaegawa, P. L. Pfister, M. Döring, M. Leuenberger, H. Wanner, A. Ohmura, Volcanic influence on centennial to millennial Holocene Greenland temperature change, Scientific Reports 7, Article number: 1441, 2017. pdf
NEWS! (2016/10/17)
Recently, I was on a radio program (Groks Science Radio Show and Podcast).
You can listen to the program I was on from here.