Page 15 of 15 < 1 2 ... 13 14 15
Topic Options
#1428601 - 21/07/2017 20:00 Re: Observations of climate variation [Re: Surly Bond]
Surly Bond Offline
Weatherzone Addict

Registered: 23/08/2003
Posts: 2067
Loc: Manilla, near Tamworth NSW




Explained here.
_________________________
Data are cheap; information is expensive!

Top
#1428648 - 22/07/2017 11:38 Re: Observations of climate variation [Re: Surly Bond]
Surly Bond Offline
Weatherzone Addict

Registered: 23/08/2003
Posts: 2067
Loc: Manilla, near Tamworth NSW
I fitted a bimodal curve to a distribution curve for all historical annual rainfalls in the post above.
Has anyone ever done that before?
I cannot find such a thing on the internet.

Searching using "bimodal rainfall" with other added terms gives results that, so far as I can see, ALL refer to the time-distribution of rainfall throughout the year. They report that many places have a seasonal rainfall pattern that is bimodal, with two distinct peaks of rainfall in a year. I made such a model myself for my town of Manilla a few years ago.

For all I know, there may be dozens of studies of bimodal distributions of annual rainfall, or of the rainfall in specific months of the year. It is important to find out. I don't see any way of narrowing my search to avoid being absolutely swamped by studies of the seasonal rainfall pattern.

Can anyone help?
_________________________
Data are cheap; information is expensive!

Top
#1428653 - 22/07/2017 14:47 Re: Observations of climate variation [Re: Surly Bond]
Knot Offline
Weatherzone Addict

Registered: 01/05/2014
Posts: 1859
Loc: Blue Bay N.S.W
I could help you out with bimodality in music but not statistical stuff I'm afraid. I managed to avoid all statistics lessons during a course I did to gain my HSC equivalent uni entry score.
_________________________
The deep blue skies of youth are unlike any other.

Top
#1428661 - 22/07/2017 18:16 Re: Observations of climate variation [Re: Surly Bond]
Surly Bond Offline
Weatherzone Addict

Registered: 23/08/2003
Posts: 2067
Loc: Manilla, near Tamworth NSW
Thanks knot, but I can't even tell a major from a minor key!

I have found that Salt Lake City has a bimodal distribution of annual rainfalls, but no analysis of the fact. Just "there are wet times and dry times". Really?
_________________________
Data are cheap; information is expensive!

Top
#1428664 - 22/07/2017 19:51 Re: Observations of climate variation [Re: Surly Bond]
Seira Offline
Meteorological Motor Mouth

Registered: 27/08/2003
Posts: 7161
Loc: Adelaide Hills.
Originally Posted By: Surly Bond
For all I know, there may be dozens of studies of bimodal distributions of annual rainfall, or of the rainfall in specific months of the year.

"Origins of the Caribbean Rainfall Bimodal Behavior"
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 115, D11106, doi:10.1029/2009JD012990, 2010.

Is one smile .

Top
#1428668 - 22/07/2017 21:06 Re: Observations of climate variation [Re: Surly Bond]
Surly Bond Offline
Weatherzone Addict

Registered: 23/08/2003
Posts: 2067
Loc: Manilla, near Tamworth NSW
Sorry, Seira. That is one of the thousands of references to seasonal bimodality.
I have observed bimodality in the distribution of annual rainfall totals in the whole rainfall record.
I am planning to check for bimodality in the distribution of all rainfall records for the month of January, then of February, and so on.
_________________________
Data are cheap; information is expensive!

Top
#1428680 - 22/07/2017 23:08 Re: Observations of climate variation [Re: Surly Bond]
Seira Offline
Meteorological Motor Mouth

Registered: 27/08/2003
Posts: 7161
Loc: Adelaide Hills.
Originally Posted By: Surly Bond
Sorry, Seira. That is one of the thousands of references to seasonal bimodality.
I have observed bimodality in the distribution of annual rainfall totals in the whole rainfall record.
I am planning to check for bimodality in the distribution of all rainfall records for the month of January, then of February, and so on.

Ok smile , sure.
I noticed:

Originally Posted By: Surly Bond
I fitted a bimodal curve to a distribution curve for all historical annual rainfalls

And:

Originally Posted By: Surly Bond
I have found that Salt Lake City has a bimodal distribution of annual rainfalls, but no analysis of the fact.

On the first, my impression is that is a fairly specific thing to do, and I am not sure how much success you’ll have finding much literature which gives certain examples (with mathematical descriptions of the processes involved), around specific geographic regions, or climate zones. You may need a combination of studies/sources to make more in-roads. I myself am not overly familiar with mathematics/processes involved, however if you are pioneering in this area, good on you smile !

On the second, with regard to an “analysis of the fact” – that I would be more interested in (the very fact of why and how bimodal distributions form and evolve).

Top
#1430574 - 14/08/2017 10:44 Re: Observations of climate variation [Re: Surly Bond]
Surly Bond Offline
Weatherzone Addict

Registered: 23/08/2003
Posts: 2067
Loc: Manilla, near Tamworth NSW
_________________________
Data are cheap; information is expensive!

Top
#1431729 - 26/08/2017 10:51 Re: Observations of climate variation [Re: Surly Bond]
Surly Bond Offline
Weatherzone Addict

Registered: 23/08/2003
Posts: 2067
Loc: Manilla, near Tamworth NSW
_________________________
Data are cheap; information is expensive!

Top
#1432017 - 28/08/2017 11:01 Re: Observations of climate variation [Re: Surly Bond]
Surly Bond Offline
Weatherzone Addict

Registered: 23/08/2003
Posts: 2067
Loc: Manilla, near Tamworth NSW


Edited by Surly Bond (28/08/2017 11:03)
_________________________
Data are cheap; information is expensive!

Top
#1441298 - 16/11/2017 09:54 Re: Observations of climate variation [Re: Surly Bond]
Surly Bond Offline
Weatherzone Addict

Registered: 23/08/2003
Posts: 2067
Loc: Manilla, near Tamworth NSW
_________________________
Data are cheap; information is expensive!

Top
Page 15 of 15 < 1 2 ... 13 14 15


Who's Online
13 registered (Dr Philosophy, Daniel Hayward, Bundy, Ricky, ashestoashes, Markus, Alf_, Jesse24, DarrylS, Whisper, drivenunder, 2 invisible), 293 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Today's Birthdays
Adele, David Simpson., HannahJayne, krambo, krambo22, Pancake, weather noob
Forum Stats
29421 Members
32 Forums
23730 Topics
1469263 Posts

Max Online: 2925 @ 02/02/2011 22:23
Satellite Image