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#1183322 - 14/03/2013 13:55 Re: Upwelling [Re: NFIP]
GrizzlyBear Offline
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Registered: 23/06/2011
Posts: 2359
Loc: Yetholme [1180m] Central Table...
That is a strange thin tounge of cold water on the coastal fringe of the south coast, must be upwelling. Doubt it can last long, should get pushed out by warmer water soon, hopefully. Quite flucky for Sydney to get such a warm patch reaching the coast. Much cooler at Port Macquarie.

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#1184351 - 18/03/2013 20:04 Re: Upwelling [Re: NFIP]
GrizzlyBear Offline
Weatherzone Addict

Registered: 23/06/2011
Posts: 2359
Loc: Yetholme [1180m] Central Table...
The temps have risen again on the South Coast, nearly 21 yesterday while Sydney has dropped back to 23. One thing that I do not get is why the ABC weather seems to show different sea temps to these Manly Hydraulic readings. Eg this evening they showed Sydney as 22 and Batemans Bay as 23. I have noticed a big discrepancy for a couple of month now.

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#1187791 - 04/04/2013 18:12 Re: Upwelling [Re: NFIP]
crikey Offline
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Registered: 01/02/2011
Posts: 2586
Loc: Tweed Heads
From the herald sun today .4th april 2013
Tens of thousands of small fish washed up along the Adelaide coastline died because of an algal bloom sparked by unseasonable weather, scientists say.
Biosecurity SA said tests suggests the deaths, which began before Easter and continued this week, were the result of AN UPWELLING of COLD WATER from deep in the ocean.
Dolphins and penguins have also died concerning the authorities
---------------


I thought algal bloom was a warm water phenomena?
Makes you wonder about toxic dumping?

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#1187958 - 05/04/2013 20:58 Re: Upwelling [Re: NFIP]
GrizzlyBear Offline
Weatherzone Addict

Registered: 23/06/2011
Posts: 2359
Loc: Yetholme [1180m] Central Table...
I could not find any info on cold water being the cause?. Just some mention of the hot weather a possible sewer contamination being possible causes.

"SA Health told The Advertiser algal blooms, found across the state's coastline most likely due to March's prolonged hot weather"

"Pathology results on a dolphin autopsy conducted last week found E coli near the dolphin's blowhole, which Dr Kemper said was an unusual spot to find the bacteria."

http://www.theaustralian.com.au/news/gul...6-1226608492179

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#1188064 - 06/04/2013 17:35 Re: Upwelling [Re: NFIP]
crikey Offline
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Registered: 01/02/2011
Posts: 2586
Loc: Tweed Heads
Also of coincidence is that there has been food poisoning in conjunction with contaminated Oysters from Tasmania in the same time period.
I believe hundreds of people were admitted to hospital
The Oyster industry believes ships may be off loading their sewerage close to the coast..YUK and deadly for both marine life and humans eating fish.
Of course E COLI bacteria is consistent with human excrement


Edited by crikey (06/04/2013 17:37)
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#1189229 - 13/04/2013 09:14 Re: Upwelling [Re: crikey]
Tom1234 Offline
Weatherzone Addict

Registered: 08/04/2011
Posts: 1709
Loc: Port Stephens
Originally Posted By: crikey



I thought algal bloom was a warm water phenomena?
Makes you wonder about toxic dumping?

---------------



Cold waters are nutrient rich which may have triggered a bloom.


Edited by Enrique (13/04/2013 09:14)

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#1190665 - 23/04/2013 09:32 Re: Upwelling [Re: NFIP]
Steve777 Offline
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Registered: 20/10/2011
Posts: 3592
Loc: Artarmon (Sydney North Shore)
Sea surface temperatures off Sydney have dropped significantly off Sydney in the past week or so, from 23-24 for the first 20 days of April down to around 21 in the last few days.

http://new.mhl.nsw.gov.au/data/realtime/sst/Sydney

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#1190775 - 23/04/2013 18:23 Re: Upwelling [Re: NFIP]
Tom1234 Offline
Weatherzone Addict

Registered: 08/04/2011
Posts: 1709
Loc: Port Stephens
probably from the low off the coast whipping up large surf. I recall it happened after the last big blow/swell we had come through.

The water at the beach is still nice but it rarely gets as warm as the off buoys unfortunately.


Edited by Enrique (23/04/2013 18:24)

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#1206405 - 06/08/2013 11:49 Re: Upwelling [Re: NFIP]
LQQKN Offline
Weatherzone Addict

Registered: 24/08/2007
Posts: 1438
Loc: , tweed coast
water is about to get a lot colder this time of year when the northerly's come threw bringing the bottem of the ocean to the surface,

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#1206740 - 09/08/2013 09:22 Re: Upwelling [Re: LQQKN]
kizz Offline
Weatherzone Addict

Registered: 11/02/2002
Posts: 1868
Loc: Beacon Hill, Sydney 152m asl
Originally Posted By: LQQKN
The water is about to get a lot colder this time of year when the northerlies come through bringing the bottom of the ocean to the surface.


Some grammar and spelling fixed!

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#1441655 - 19/11/2017 09:13 Re: Upwelling [Re: NFIP]
Steve777 Offline
Weatherzone Addict

Registered: 20/10/2011
Posts: 3592
Loc: Artarmon (Sydney North Shore)
Thought I might revive this thread after 4 years.

Sea temps off Sydney are now quite cold, cooler than I noticed at any time the last Winter (never below 17). It is now just 16.55 about 10km off Manly. The situation is similar at all MHL bouys South from Crowdy Head (between Forster and Port Macquarie) following over a week of persistent North Easterlies.



The NE winds look likely to continue for 7-10 days as a stagnant high squats in the Southern Tasman Sea. This will likely result in continued chilly waters (good for fishing I understand), cooler, stronger sea breezes, cooler temps on the coastal fringe and possibly also sea fogs.

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#1441665 - 19/11/2017 11:44 Re: Upwelling [Re: NFIP]
Kino Online   content
Weatherzone Addict

Registered: 10/08/2017
Posts: 1263
Loc: Wollongong, NSW, Aus
Thatís an insane drop! Upwelling is indeed great for fishing, not so good for those who like the beach.

Climate impacts? Obv cooler stronger sea breezes as the thermal variation would be greater. Assume it would also kill any local storm chances as maritime air is less buoyant and more stable?

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#1441686 - 19/11/2017 17:29 Re: Upwelling [Re: Kino]
Wave Rider Offline
Meteorological Motor Mouth

Registered: 27/01/2014
Posts: 6438
Loc: Wollongong and Berrima NSW
Originally Posted By: Kino

Climate impacts? Obv cooler stronger sea breezes as the thermal variation would be greater. Assume it would also kill any local storm chances as maritime air is less buoyant and more stable?


And it causes bigger inversions which are bad for storms, and it can create sea fog too because it's easier for the dew point to exceed the temp of the ocean when the water is cold, thus creating fog.
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#1441695 - 19/11/2017 18:05 Re: Upwelling [Re: NFIP]
Petros Offline
Meteorological Motor Mouth

Registered: 30/12/2002
Posts: 6598
Loc: Maffra, Central Gippsland, Vi...
Havent looked in the climate thread yet, hope its noted there.

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#1441817 - 20/11/2017 23:38 Re: Upwelling [Re: NFIP]
Steve777 Offline
Weatherzone Addict

Registered: 20/10/2011
Posts: 3592
Loc: Artarmon (Sydney North Shore)
Here is the infrared satellite view of central part of the NSW coast earlier this evening. There is a bit of low cloud about, but skies are fairly clear near Sydney. You can clearly see the boundary of the colder water (lighter colour) upwelling off the coast, maybe 12-20 km out to sea.


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