Item talk:Q229173

{

 "@context": "http://schema.org/",
 "@type": "WebPage",
 "additionalType": "Research",
 "url": "https://www.usgs.gov/centers/spcmsc/science/paleoclimate-reconstruction-marine-and-lake-sediments",
 "headline": "Paleoclimate Reconstruction from Marine and Lake Sediments",
 "datePublished": "March 7, 2018",
 "author": [
   {
     "@type": "Person",
     "name": "Julie Richey, Ph.D.",
     "url": "https://www.usgs.gov/staff-profiles/julie-richey",
     "identifier": {
       "@type": "PropertyValue",
       "propertyID": "orcid",
       "value": "0000-0002-2319-7980"
     }
   }
 ],
 "description": [
   {
     "@type": "TextObject",
     "text": "Pigmy Basin"
   },
   {
     "@type": "TextObject",
     "text": "Fisk Basin"
   },
   {
     "@type": "TextObject",
     "text": "Regionally coherent Little Ice Age cooling in the Atlantic Warm Pool"
   },
   {
     "@type": "TextObject",
     "text": "1400 yr multiproxy record of climate variability from the northern Gulf of Mexico"
   },
   {
     "@type": "TextObject",
     "text": "Sediment cores collected from high-accumulation rate basins in the deep Gulf of Mexico, along with lake sediment cores from lakes in the tropics and sub-tropics, are used to develop highly-resolved records of past climate variability over the Holocene (the last 10,000 years). Analysis of microfossils, trace metal geochemistry, stable isotope geochemistry and biomarkers is performed at sub-millennial to decadal resolution to generate records of climate variability."
   },
   {
     "@type": "TextObject",
     "text": "Merging late Holocene molecular organic and foraminiferal-based geochemical records of sea surface temperature in the Gulf of Mexico"
   },
   {
     "@type": "TextObject",
     "text": "The hydrogen isotopic composition (\u03b42H) of lipids from leaf waxes and algal lipids can be used as a proxy for hydroclimatic changes in the past. One of the projects that scientists at the USGS St. Petersburg Coastal and Marine Science Center are working on is the reconstruction on precipitation variability in central Florida over the past 2000 years."
   },
   {
     "@type": "TextObject",
     "text": "Instrumental measurements of climate variables (e.g., precipitation, temperature, ocean circulation, etc.) are only available over the past century or less. In order to quantify the rate and magnitude of natural climate variability going back in time beyond the 20th century, scientists rely on paleoclimate reconstructions."
   },
   {
     "@type": "TextObject",
     "text": "Holocene paleoceanographic reconstructions from the Gulf of Mexico:"
   },
   {
     "@type": "TextObject",
     "text": "Scientists at the USGS SPCMC have been focused on generating high-resolution (decadal to multi-decadal) records of sea surface temperature and salinity variability from sediment cores collected throughout the northern and western Gulf of Mexico. The primary proxy used is the magnesium to calcium ratio (Mg/Ca) paried with the oxygen isotopic composition (\u03b418O) of the planktic foraminifer, Globigerinoides ruber."
   },
   {
     "@type": "TextObject",
     "text": "Garrison Basin"
   },
   {
     "@type": "TextObject",
     "text": "The larger goal of this project is to use paleoceanographic reconstructions from the Gulf of Mexico and surrounding region to better understand what mechanisms are forcing climate variability on decadal to centennial time-scales. These reconstructions are also used to assess how phenomena like El Nino Southern Oscillation (ENSO), Atlantic Multidecadal Oscillation (AMO), Atlantic Meridional Overturning Circulation (AMOC), etc., behave in the pre-anthropogenic era."
   },
   {
     "@type": "TextObject",
     "text": "Pronounced centennial-scale Atlantic Ocean climate variability correlated with Western Hemisphere hydroclimate"
   }
 ],
 "funder": {
   "@type": "Organization",
   "name": "St. Petersburg Coastal and Marine Science Center",
   "url": "https://www.usgs.gov/centers/spcmsc"
 },
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     "name": "Climate"
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}