BrianMatthews
Badges: 0
Rep:
?
#1
Report Thread starter 4 years ago
#1
I am currently studying weather and climate for my main geography exam and we have just been covering the topic of 'anticyclones'.We know that anticyclones can last for days, weeks and months and are classed as blocking anticyclones.I was wondering if anybody knows the following information:
1) why do they last in an area (Britain for example in 2003) for a long time and then eventually clear and move away
2) If high pressure moves to low pressure, how do blocking anticyclones last.Any information on this would be really helpful for a presentation I'm doing!
Thanks!
-Brian
0
reply
CurlyBen
Badges: 19
Rep:
?
#2
Report 4 years ago
#2
Met isn't my strongest subject, but I do know a little! I don't really know what level you're pitching at - for example have you covered general circulation/Hadley circulation?

Anyway some things to think about:
- anticyclones are not necessarily blocking anticyclones. An anticyclone is simply an area of high pressure, but a blocking anticyclone is one which lasts a long time and moves very slowly (some don't last long)
- air does move from high to low, but in an anticyclone that movement is generally slow as the pressure gradient is shallow. In addition, if more air is being brought in at upper level then that can replenish the low level outflow
- remember that an anticyclone is an area where air is descending, rotating clockwise (in the northern hemisphere) and flowing outwards
- this is a bit of guesswork from me, but I think it makes sense: think about what causes changes in pressure - differential heating. Areas of intense cold tend to be large (Siberia!) which gives a large air mass of relatively uniform characteristics, hence low pressure gradients. Without a pressure gradient there's nothing to make them move.
- you might also want to look at whether movement of the ITCZ and sub-polar low affect the formation of blocking anticyclones
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

Should there be a new university admissions system that ditches predicted grades?

No, I think predicted grades should still be used to make offers (581)
34.2%
Yes, I like the idea of applying to uni after I received my grades (PQA) (698)
41.08%
Yes, I like the idea of receiving offers only after I receive my grades (PQO) (342)
20.13%
I think there is a better option than the ones suggested (let us know in the thread!) (78)
4.59%

Watched Threads

View All