L18_Paleoclimate-Recent-Time

However since 18o preferenally le6 the vapor phase and

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Unformatted text preview: = 0 ‰ liquid To understand the temperature effect, we need to consider two observa=ons… Observa=on #1: Water vapor is always depleted in the heavy isotope compared to liquid water closed container δ18O = - 9 ‰ vapor δ18O = 0 ‰ liquid δ18O = - 19 ‰ vapor δ18O = - 10 ‰ liquid The isotope “frac=ona=on” is about - 9 ‰ at typical Earth surface temperatures Observa=on #2 Warm air holds more water vapor than cold air. Water vapor pressure as a func=on of temperature 1 ATM = 100 kPa Observa=on #2 Warm air holds more water vapor than cold air. Why does it rain? Because some water vapor- saturated air mass cooled, and hence could no longer hold the water as vapor. The water leaves as liquid (rain). Equilibrium Line Rel. Humidity = 1 not allowed (supersatura...
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