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Climate Change 2016
October 27-29, 2016
Volume 7, Issue 9(Suppl) J Earth Sci Clim Change
ISSN: 2157-7617 JESCC, an open access journal
conferenceseries .com
October 24-26, 2016 Valencia, Spain
World Conference onClimate Change
Does the climate warming hiatus exist over the Tibetan Plateau?
Anmin Duan1,2 and Zhixiang Xiao1,3
1Chinese Academy of Sciences, China
2Nanjing University of Information Science & Technology, China
3University of Chinese Academy of Sciences, China
The surface air temperature change over the Tibetan Plateau is determined based on historical observations from 1980
to 2013. In contrast to the cooling trend in the rest of China, and the global warming hiatus post-1990s, an accelerated
warming trend has appeared over the Tibetan Plateau during 1998–2013 (0.25 °C decade−1), compared to that of 1980–1997
(0.21 °C decade−1). Further results indicate that, to some degree, such an accelerated warming trend might be attributable
to cloud–radiation feedback. The increased nocturnal cloud over the northern Tibetan Plateau would warm the nighttime
temperature via enhanced atmospheric back-radiation, while the decreased daytime cloud over the southern Tibetan Plateau
would induce the daytime sunshine duration to increase, resulting in surface air temperature warming. Meanwhile, the in
situ surface wind speed has recovered gradually since 1998, and thus the energy concentration cannot explain the accelerated
warming trend over the Tibetan Plateau after the 1990s. It is suggested that cloud–radiation feedback may play an important
role in modulating the recent accelerated warming trend over the Tibetan Plateau.
J Earth Sci Clim Change 2016, 7:9(Suppl)
Negative emissions-Options to make that real
Hans J Mueller
Ecoforestech, Germany
Among many other information in my understanding the most important result of the United Nations Framework
Convention on Climate Change, 21st Conference of the Parties, short form United Nations Framework Convention on
Climate Change, 21st Conference of the Parties at Paris, short form COP 2015 is that limiting further greenhouse gas emissions
is simply insufficient to make the survival of mankind possible. In near future we need negative emissions and the time frame
for doing that is closing rapidly. If we continue in a way we do right now it looks like the global mean surface temperature of
planet Earth will reach something between +5 and +7 degrees above the global mean temperature of the preindustrial era, i.e.
about 1750, latest 1815. Similar conditions already existed in geological history. Last time it happened at the Permian-Triassic-
extinction event, 252 Mio years ago. As the result of this, 98.5% of all species became extinct. Most of them were much more
robust than we are. Consequently the agreement to limit the temperature increases in a minimum to about +2 degrees, and
if procurable even to +1.5 degrees is crucial. What that means in terms of land use and technology is widely not understood.
Unfortunately all our recent tools, as replacing elder combustion techniques by higher developed new ones, extended use of
renewable energies, i.e. wind turbines, photovoltaic panels and the use of sustainable vegetable products etc. are completely
insufficient to reach that goal. All of them are only able to reduce future emissions to some degree. Unfortunately even this small
positive effect is overcompensated by the global industrial growth and the standard of living improvement of a growing world
population. The unpleasant truth is business as usual combined with a little more reasonable, i.e. more ecological behavior,
is good, but much too less unfortunately. During the last 200 years we have used our atmosphere as a waste disposal site, as
we also did in the countryside and in the rivers. Meantime many countries of the world have sanified the dump sites and the
rivers. Now it’s time to do that with the atmosphere too. I think we only have a chance for a further sustainable development if
we restore our atmosphere as close as possible back to its stage of 1815. This has to be done latest during the seventies of this
century. The paper attempts to interpret this with realistic scientific and technological options and techniques to make that
reality.