The time series below shows global distribution and variation of the concentration of mid-tropospheric carbon dioxide in parts per million ppm. The overall color of the map shifts toward the red with advancing time due to the annual increase of CO 2.
Images of Change. Explore a stunning gallery of before-and-after images of Earth from land and space that reveal our home planet in a state of flux.
They were started by C. The last five complete years of the Mauna Loa CO 2 record plus the current year are shown in the first graph. The red lines and symbols represent the monthly mean values, centered on the middle of each month. The black lines and symbols represent the same, after correction for the average seasonal cycle. The latter is determined as a moving average of SEVEN adjacent seasonal cycles centered on the month to be corrected, except for the first and last THREE and one-half years of the record, where the seasonal cycle has been averaged over the first and last SEVEN years, respectively.
Measurements at different altitudes make it possible to monitor the global distribution of CO 2 and its increase with the passage of time Figure 2. Their respiration also varies at high latitudes, including the poles, where in the winter there is no sunlight at all.
In contrast to passive monitoring systems that work with reflected sunlight, the ACES team is working with active monitors where the lasers send continuous-wave beams down to Earth. The ACES monitoring package is installed on an airplane that flies at about 30, feet. This system generates the high laser power at precisely controlled frequencies that is needed for precise CO 2 measurements of better than 1. Control Global. Menu Newsletters Subscribe. Search Sponsored By:. NASA's role in CO 2 measurements In , ground-based total column measurements mostly replaced the surface-only CO 2 monitoring and later, those were supplemented by airplane, drone and, eventually, satellite monitoring.
Our effort to gain control of Earth's weather begins by understanding how it works. Given the centrality of its measurement to the climate change conversation, readers had…. Gas detection can communciate wirelessly, offering a more flexible, easy to-deploy system. Bex and P. Midgley eds. Lan, B. Hall, G. Dutton, J. Le Floch, B. Bereiter, T. Blunier, J. Barnola, U. Siegenthaler, D. Raynaud, J. Jouzel, H. Fischer, K. Kawamura, and T. High-resolution carbon dioxide concentration record ,, years before present.
Nature , Vol. Woods Hole Oceanographic Institution. Introduction to ocean acidification. Accessed October 4, Lindsey, R. We value your feedback Help us improve our content Your Email Address. Security code. An Upwelling Crisis: Ocean Acidification. How much will Earth warm if carbon dioxide doubles pre-industrial levels?
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