Seminar by Dr. Hannah Horowitz

Impacts of anthropogenic change on pollution and climate

Human activity impacts both sources of pollutants, as well as the chemical and physical processes determining the pathways from sources to societal impacts. In this talk I will focus on the mercury cycle as an example of the full biogeochemical cycle of a pollutant. Mercury (Hg) adversely affects human health on a global scale through fish consumption. It remains cycling in the ocean for decades to centuries, such that present-day and future environmental loadings are influenced by the past.

Jasmine - Seminar Room (1010), 10th floor, M Building

Seminar by Dr. Jin-Soo Kim

Two-way Interactions between Terrestrial Ecosystem and Climate System

Better understanding of factors that control the global carbon cycle could increase confidence in climate projections. In this study, long-term simulations of the Earth system models (ESMs) in phase 5 of the Coupled Model Intercomparison Project archive were used to examine the interannual carbon flux variability associated with ENSO.

Jasmine - Seminar Room (1010), 10th floor, M Building

Seminar by Dr. Gokhan Danabasoglu

Atlantic Meridional Overturning Circulation:
Low-Frequency Variability and Model Representation

The Atlantic meridional overturning circulation (AMOC) is thought to play a major role in decadal and longer time-scale climate variability as well as in prediction of the earth’s future climate on these time scales. However, because only rather short records of continuous observational estimates of AMOC transports are available at very limited locations and only for the recent period, support for such a prominent role for AMOC primarily comes from model simulations.

Jasmine - Seminar Room (1010), 10th floor, M Building

Seminar by Mr. Ryohei Yamaguchi

Observed long-term trend and variability in global upper-ocean stratification

Many studies on future projections by climate models of the Coupled Model Intercomparison Project (CMIP) point out the long-term strengthening of the upper-ocean stratification due to the surface intensification of the ocean warming associated with global warming. The strengthened stratification will reduce vertical nutrient supply from the subsurface by more stabilizing the upper-ocean water column, and then the primary production of the whole ocean is concerned to decrease.

Jasmine - Seminar Room (1010), 10th floor, M Building

Seminar by Dr. Yun-Young Lee

Two Types of California Central Valley Summer Heat waves

Understanding the mechanisms of how Californian Central Valley (CCV) extreme heat waves develop is very important as the events have major impacts on the economy and human safety. This study diagnoses the temporal and spatial evolution as well as the thermodynamics and dynamics of Large Scale Meteorological Patterns (LSMPs) during extreme CCV heat waves.

Jasmine - Seminar Room (1010), 10th floor, M Building

Seminar by Prof. Christopher J. Bae

Paleoenvironmental Influences on the Earliest Peopling of the Japanese Archipelago

During major glacial periods when sea levels were substantially lower the main islands of the Japanese archipelago (Honshu, Kyushu, Shikoku) that form paleo-Honshu would have been connected to the Asian landmass at the southern end of the Korean peninsula. Hokkaido has been connected to the Asian landmass more frequently through Sakhalin, but deeper ocean trenches suggests very irregular connections between Hokkaido and paleo-Honshu.

Jasmine - Seminar Room (1010), 10th floor, M Building

Seminar by Dr. Ji-Woong Yang

Global- and regional paleoclimate reconstructions from greenhouse gas and borehole temperature of polar ice cores

According to IPCC report, the Earth’s climate has been warming rapidly since the 20thcentury, and the current warming trend is expected to continue in the upcoming decades. Therefore, the “paleoclimatologists” are searching for hints from the history of the Earth’s climate. The paleoclimate proxy archives have recorded the temporal evolution of the climate and environment in local to global scale.

Jasmine - Seminar Room (1010), 10th floor, M Building

Seminar by Prof. Kyoung-nam Jo

Paleoclimatic investigations using carbonate speleothems in South Korea

A cave is defined as a naturally formed underground cavity large enough for human entry. According to the formation processes, caves are usually divided into solution, volcanic, glacier, crevice, and erosion caves, etc. Among solution types, limestone caves commonly include various types of carbonate speleothems. The speleothems in limestone caves are mostly composed of carbonate minerals with calcite, aragonite, or a combination of two.

Jasmine - Seminar Room (1010), 10th floor, M Building

Seminar by Prof. Fei-Fei Jin

On ENSO Theory

The fundamental dynamical mechanisms of the El Nino-Southern Oscillation (ENSO)phenomenon have been extensively studied since Bjerknes envisioned ocean-atmosphere interaction in the equatorial Pacific as its main cause.

Jasmine - Seminar Room (1010), 10th floor, M Building