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ESE&SOCIETY SEMINAR Assessment of the Impacts of Climate Change, from CMIP5 to IPCC Reports The East Asian Monsoon is a seasonally reversing circulation that during the summer months brings moist air from the Indian Ocean and Pacific Ocean to East Asia. It affects approximately one-third of the global population, mainly in China, Korea and Japan. The East Asian Rain season, which is known as Meiyu in China or Baiu in Japan, is a consistent precipitation caused by a stationary front which lies approximately at 30 N and spans from 110 E to 135 E. The onset on Meiyu is around mid-June and generally it lasts from 15 days to 1 month. Moreover, nonnegligible inter-annual variability in the strength of precipitation along the Meiyu front can cause severe flooding or drought in the affected area. The East Asian Monsoon is a very complex system, since it shows both barotropic and baroclinic characteristics in China and Japan respectively. I am using re-analysis data to analyze the East Asian Monsoon from a point of view of both climate and weather. So far, I am engaged in finding out what mainly causes the inter-annual fluctuations and how East Asian Monsoon will change in the future according to CMIP 5 data. (go to the beginning) *data used GPCP V2.2 CMIP 5 NCEP-NCAR Reanalysis ECMWF Interim Reanalysis
Using All Sky (AK) CMIP5 CERES data, I analyze the change in albedo over Atlantic and Pacific Ocean in the latest 10 years. The ultimate goal is to find the change in cloud due to the change in emission of aerosols in China and America. Intuition tells us that the increasing emission of aerosols in China, which is somewhat correlated with the development of GDP, can facilitate the cloud formation over the west North Pacific Ocean while the decreasing emission of aerosols in the United of States can inhibit the cloud formation over the west North Atlantic Ocean. An initial analysis tells us it is right. However, a sophisticated study is needed, such as removing the difference in dynamic parts among different years could pronounce the aerosol effect on regional and global climate change. Future research, combined with economics and political science, could help us better mitigate the negative effect of climate change. (go to the beginning) *data used CMIP5 CERES Data
Saturn is the second largest planet in the solar system and there are lots of mysteries on it, one of which is its internal rotation rate. Unlike the other planets, Saturn's rotational axis is parallel to its axis of axismagnetic field, through which we cannot measure its internal rotation rate. This means the field is no help in telling us the internal rate of rotation. All we have are atmospheric phenomena cloud motions, winds, etc. People till now have used various ways to approximate the real internal rotation rate, namely, trace of Saturn's Great White Spots (GWS),using isobaric surface as a proxy for geoid, using stability criterion with respect to Arnol'd's second stability theorem etc. However, those methods all have fatal defects and the results are not the real internal rotation rate. (go to the beginning)
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2012 @ California Institute of Technology |
