EAE1011 - The Earth system: From the core to the atmosphere - S1 2025
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Refer to your plot of Tp – T at 1200 EDST. The parcel is initially negatively buoyant (i.e., Tp – T < 0). What is the height at which the parcel becomes positively buoyant (i.e., Tp – T becomes positive - the level of free convection)?
How does the level where the air parcel becomes positively buoyant (level of free convection) change after the initial parcel temperature and dewpoint temperature are increased by 6 °C and 7 °C respectively?
The 6 °C increase in surface temperature from burning alone was not enough to change the environmental conditions so that pyro-cumulonimbus could form. There was still a negatively buoyant layer between 4000 and 6000 m that prevented rising air from freely rising. What important additional factor changed because of the fire and why was it important?
Given that the bushfire conditions, as measured by the FFDI, is relatively insensitive to temperature changes why is it that more extreme bushfire behaviour is expected under climate change?
What are two factors that distinguish a midlatitude cyclone from a tropical cyclone?
The FFDI was found to change from 45 at 1200 EDST to 91 at 1500 EDST. Which atmospheric variable contributed the least to the doubling of the FFDI?
Based on Figure 2, what is the wind direction at Canberra at 10 am EDST 18 January 2003, and what is the predicted wind direction after the passage of the cold front through Canberra?
The atmospheric conditions on a particular day are such that the temperature at the surface is 15°C and the lifting condensation level (LCL) is at 3 km height above the surface. If an air parcel is lifted from the surface, what is its temperature (in °C) at a height of 2 km above the surface?
What are three observations that help us quantify the weather?
The temperature to which a parcel of air must be cooled for the water vapour in it to start to condense into liquid, is the definition of which thermodynamic variable?
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