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Tropospheric warming change

Since ROS are formed from the absorption of UVR by DOM and its subsequent photochemical decay, any changes in the atmosphere such as tropospheric warming or stratospheric ozone depletion should affect steady state concentrations of ROS in the water column. Initial studies with H2O2 suggest that the formation of an ozone hole will increase production rates by 20-50%. Changes in atmospheric ozone levels are also expected to affect production rates of other... [Pg.275]

The warming climate is likely to induce changes in the hydrological cycle that will lead to further climate change. Increased heating should increase the rate of evaporation and, hence, the amount of water vapor, which is a GHG. The IPCC s Fourth Assessment Report, published in 2007, finds that the average atmospheric water vapor content has increased since at least the 1980s over land and ocean as well as in the upper troposphere. ... [Pg.747]

As discussed earlier, although C02 warms the troposphere, it cools the stratosphere since it efficiently radiates infrared out to space. This effect can contribute to changes in the temperature profile in the stratosphere and potentially have a signficant impact... [Pg.776]

The regions of the atmosphere are defined by the vertical temperature profile. At the bottom is the troposphere where temperature decreases with height from the surface (which is warmed by the sun). The rate of change of temperature (the lapse rate) depends on the amount of moisture in the air since the latent heats of condensation and evaporation affect the heat of a rising or descending air parcel. For dry air the dry adiabatic lapse rate is — 9.8 K km but a more typical value of the environmental lapse rate (for air containing some water vapor) is — 6.5 K km The troposphere extends up to about 10 km, though this varies with... [Pg.28]

The stratosphere has cooled markedly since the 1960s. This trend is partially a result of stratospheric ozone depletion and partially a result of the accumulation of greenhouse gases, which warm the troposphere but cool the stratosphere. Stratospheric circulation has responded to the radiatively induced temperature changes by concentrating the effects at high altitudes of the winter hemisphere, where cooling of up to 5°C has been observed. [Pg.1028]


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Troposphere

Tropospheric

Warming

Warmness

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