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Underway physical oceanography and carbon dioxide measurements during Southern Surveyor cruise SS201007

Authors
Publisher
PANGAEA
Publication Date
Identifiers
DOI: 10.1594/pangaea.812298
Keywords
  • 09Ss20100906-Track
  • Algorithm
  • Depth
  • Bathymetric
  • Interpolated
  • Distance
  • Extracted From Globalview-Co2
  • Extracted From The 2-Minute Gridded Global Relief Data (Etopo2)
  • Extracted From The Ncep/Ncar 40-Year Reanalysis Project
  • Extracted From The World Ocean Atlas 2005
  • Fugacity Of Carbon Dioxide (Water) At Sea Surface Temperature (Wet Air)
  • Pressure
  • Atmospheric
  • Pressure
  • Atmospheric
  • Interpolated
  • Pressure At Equilibration
  • Quality Flag
  • Recomputed After Socat (Pfeil Et Al
  • 2011)
  • Salinity
  • Salinity
  • Interpolated
  • Socat
  • Southern Surveyor
  • Ss201007
  • Surface Ocean Co2 Atlas Project
  • Temperature
  • Water
  • Temperature At Equilibration
  • Underway Cruise Track Measurements
  • Xco2 (Air)
  • Interpolated
  • Xco2 (Water) At Equilibrator Temperature (Dry Air)

Abstract

Carbon Cycle Greenhouse Gases The Global Greenhouse Gas Reference Network measures the atmospheric distribution and trends of the three main long-term drivers of climate change, carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O), as well as carbon monoxide (CO) which is an important indicator of air pollution. The Reference Network is a part of NOAA's Earth System Research Laboratory in Boulder, Colorado. The measurement program includes around the clock measurements at 4 baseline observatories (Figure 1, light blue squares) and 8 tall towers (green triangles), air samples collected by volunteers at more than 50 sites (red dots), and air samples collected regularly from small aircraft mostly in North America (dark blue crosses). The air samples are returned to Boulder for analysis. All measurements of up to ~55 trace gases are subject to stringent quality control procedures, and are directly traceable to internationally accepted calibration scales where possible. In fact, NOAA’s Global Greenhouse Gas Reference Network maintains the World Meteorological Organization calibration scales for CO2, CH4, CO, N2O, and SF6 in air. Monthly average carbon dioxide data for the four baseline observatories are plotted in Figure 2. The observed increase, due primarily to CO2 emissions from fossil fuel burning, is similar at all four remote locations. CO2 remains in the atmosphere for a very long time, and emissions from any location mix throughout the atmosphere in about one year. The annual oscillations at the two northern hemisphere sites (Barrow, Alaska and Mauna Loa, Hawaii) are due to the seasonal imbalance between the photosynthesis and respiration of plants on land. During the summer photosynthesis exceeds respiration and CO2 is removed from the atmosphere, whereas outside the growing season respiration exceeds photosynthesis and CO2 is returned to the atmosphere. The seasonal cycle is strongest in the northern hemisphere becaus

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