Hence the relatively small projected sea level rise by the year 2100, as compared to the changes measured in tens of meters that occurred in Earth's history (see Introduction). The rise by 2100 is only a small beginning of a much larger, multi-century response of ocean and ice sheets to elevated global temperatures.
Single Speed Pool Pumps: Runs at a single speed, 3450 rpm (revolutions per minute). Imagine if your car ran at 3450 rpm - all the time, and how much gas you would use! Dual Speed Pool Pumps: Have a fourth wire coming into the pump, the low speed wire. This allows you to run the pump on low speed for 8-16 hrs per day, and high speed for 4-8 hrs. Variable Speed Pool Pumps: Operates at many speeds, programmable and self-optimizing for the highest energy efficiency and greatest energy savings.
1 The swimming pool pump should operate 8 to 10 hours a day in the summertime to turn the water. 2  If you donât winterize the pool, the water should circulate 4 to 6 hours a day. 3  Set your timer to reflect the appropriate season. 4  Start with the longest recommended pumping time recommended by the poolâs manufacturer.. Set the time and date. Press the âModeâ button until you see âSet Upâ on the screen. Depress the âOn/Offâ button to display âAM/PM.â Use the â+â and â- buttons to select the appropriate time. Press âOn/Offâ again to display the hour and use the â+â to set the hour.