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Earth’s Seasons have their Reasons: The Wobbly Journey Around the Sun

presented by Dr. Jacob Mey

7:00 PM Saturday, August 10, 2013
The Ross School
18 Goodfriend Rd, East Hampton, NY

 

We all wonder sometimes why there were ice ages, why do they come and go? Some of us don’t know that they come and go every hundred thousand years or so. Some of us wonder why we have four annual seasons in our neck of the woods and somewhere else they hardly feel a seasonal change at all. Whether these seasons are annual, decadal or perhaps ‘Centi-Millennial’–they are all related to the way Earth wobbles and tilt’s through space as it swings around the Sun. We’ll take a tour of some of these wobbles and tilt’s and see what we’ve learned from Scientists such as Milankovitch and Galileo and from 800, 000 year old Antarctic ice-cores.

About the Presenter

Insatiable curiosity of the Natural Sciences. To deepen our understanding of this 'ball of rock' flying through space we call Earth, so we can become better tenants. To promote scientific literacy—especially among our younger generation and those with less fortunate access to science education.

Jacob's main expertise lies in isotope geochemistry of the Uranium series disequilibria and other isotope systems used for dating geological materials, especially carbonates (corals) used to study changing conditions in the past climate.

Jacob is also a member of a research group at Columbia University focusing on Environmental and geochemical studies of natural Arsenic contamination of groundwater in Bangladesh and in the US. At Kingsborough College he researches and models water mixing using oxygen and carbon isotopes in the large urban estuary of Jamaica Bay. Although focus is on broad Applications of isotope geochemistry in paleoclimatology and environmental science, Jacob has a past in petrological and mineralogical expertise of igneous rocks, especially the Bushveld layered intrusion and the exotic ultra alkaline rocks (kimberlites and ultramafic lamprophyres).

These fields have fostered a rich background and expertise in important instruments for the paleo climatologist/igneous petrologist – some of which include: Inductively Coupled Plasma Mass Spectrometry (ICP?MS: LA and HR), Electron Micro-Probes (EMP), Scanning Electron Microscopes (SEM), Cathodoluminescence (CL) ,Backscatter Electron imaging and chemistry (BSE), Laser Scanning Confocal microscopy (LSCM), X-Ray diffraction (XRD) and X-Ray fluorescence (XRF), Total inorganic (TIC) and organic carbon (TOC).

Jacob is currently teaching several courses alternating between ‘Oceanography and Climate', ‘Meteorology and Climate', 'Physical Geology' and 'Introduction to the Earth Sciences'.

This program is partially funded by Suffolk County

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