- Page 7 Of 8 Zoom The Last Impact Of Climate Change We Will Investigate Is The Increase In Sea Level Warmer Sea Surfac 1 (99.2 KiB) Viewed 10 times
- Page 7 Of 8 Zoom The Last Impact Of Climate Change We Will Investigate Is The Increase In Sea Level Warmer Sea Surfac 2 (19.33 KiB) Viewed 10 times
Page 7 > of 8 ZOOM The last impact of climate change we will investigate is the increase in sea level. Warmer sea surface temperatures in the upper 700 meters of the oceans have been causing sea levels to rise (warmer water expands). These sea level changes are happening on a global, or custatic, scale. How do we know where sea level was in the Past? Prior to the development of satellite technology, sea levels were measured using coastal tide gauges commonly attached to piers in harbors. Satellites can now detect very small amounts of vertical changes in the height of the sea surface (within a millimeter or two). Tice gauge data from the mid-1900's to the 1990's is the only source of historical long-term sea level measurements. Coastal geologic landforms indicate the locations of sea levels on much longer time scales, c.g., the presence of elevated wave out platforms (marine terraces Figure 5 shows sea level trends from satelite measurements since 1992. The baseline of zero lo is set at 1990 • 60 • TOPEX jason 1 JASON Jason 60-day smoothed Quadratic Average Rate: 3.3 0.4 mm Acceleration: 0097 0.025 mm 40 20 I ថ្មី 0 -20 Weverity of Calerado 2020 -40 Seasonal Signal Reived 1995 2000 2005 2010 2015 2020 Year Figure 6. Satellite sea level measurements from 1992 to present. The different colors on the curve represent one of the four different satellites that were taking measurements. A best fline has been inserted connecting the data points. 10. Identify the change in mean sea level (ML) from Figure 12 for the following sh-year time intervals. Use the best fit line when determining the sea level height above the baseline 1996 - 2002: . mm b. 2007 - 2008: mm . c. 2008 - 2014: mm d. 2014-2020: mm Page 7 of 8
Page < of 8 o ZOOM 11. What is the general trend in sea level since measurements began being taken? Describe. 12. Explain the relationship between temperature and sea level rise.