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Monday, November 4

John Irving: Quantifying the Sequestration Time of Remineralized CO2 in the California Current Ecosystem
Description: Within the California Current Ecosystem particulate organic carbon (POC) vertically migrates based on different export pathways. These various export pathways influence the depth of remineralization, a process in which heterotrophic zooplankton and bacteria utilize POC and release CO2 as a product of respiration. To quantify the sequestration time of this CO2 within the ocean a lagrangian patricle tracking simulation was conducted using the MITgcm Floats Package and HYCOM reanalysis data. The goal of this project is to compare sequestration time as a function of remineralization depth, with the general hypothesis that the deeper remineralized CO2 will be sequestered for longer periods of time.

Yangxing Zheng: resentation title: Distinctions in Indian soil moisture variability between strong and weak Indian summer monsoons
Description: This observational study focuses on examining the distinctive Indian soil moisture variability between strong and weak Indian summer monsoons (ISMs). This study uses the daily gridded (1ox1o) rainfall data set provided by the India Meteorological Department (IMD) and the daily gridded (0.25ox0.25o) soil moisture combined product version 03.2 from European Space Agency Climate Change Initiative (ESA CCI) over the overlapping period 1991–2014 from the two datasets. Daily soil moisture is highly sensitive to daily rainfall rates in June during both strong and weak ISMs because the major part of Indian soil is almost dry and/or unsaturated before the onset of the ISM and any amount of water added through rainfall is reflected in the soil moisture. However, the high dependence of soil moisture on the rainfall continues only in July of weak ISMs, which can be attributed to the overall unsaturation of soil moisture content and delayed influence of soil moisture memory during June of weak ISMs compared to those during June of strong ISMs. Probability density function (PDF) analysis suggests that higher soil moisture events occur more frequently during strong ISMs than during weak ISMs, which is similar to the behaviors of daily rainfall rates between strong and weak ISMs. That said, the PDF shapes of daily soil moisture appear different from the PDF shapes of daily rainfall, implying that factors other than rainfall (e.g., evapotranspiration and runoff processes, not studied in the paper) play a comparable role in the variation of soil moisture.

Monday, December 2

John Ueling: TBA


Taylor Shropshire: TBA

NOTE:  Monthly talks are usually scheduled for the first Monday of each month (but the beginning of the semester and a Monday holiday change that for this month). The first talk starts at 11:00AM. Each talk is typically 12 minutes long (similar to many professional meetings), with 8 minutes for questions. Unless otherwise indicated, COAPS seminars and colloquia are are held in the COAPS Conference Room located at 2000 Levy Ave, Innovation Park

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Center for Ocean-Atmospheric Prediction Studies (COAPS)