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Phytoplankton of Gulf of Carpentaria, Australia – May 28th, 2013

16.8S 139.8E

May 28th, 2013 Category: Image of the day, Phytoplankton

Australia – May 28th, 2013

The phytoplankton of the shelf waters of the Gulf of Carpentaria, Australia, is basically a diatom flora, distinctly different from the oceanic, predominantly dinoflagellate flora of the Coral Sea and Indian Ocean. Large morphologically elaborate tropical diatoms and dinoflagellates of this shelf region show great species diversity (click here for more information).

Tropical Cyclone Zane (23P) Expected to Dissipate Over Gulf of Carpentaria

14.6S 146.9E

May 1st, 2013 Category: Tropical Cyclones

Tropical Storm Zane (23P) – April 30th, 2013

Enhanced image

Track of Tropical Storm Zane (23P) - April 30th, 2013 © Univ. of Wisconsin

Track of TC 23P

Tropical Cyclone Zane (23P) is being driven westward by a mid- to high- level anticyclone over the Coral Sea, which is weakening and pulling away towards the Solomon Islands.

In anticipation of the weaker steering influence, the JTWC track forecast hedges a little bit slower and poleward, but remains close to, consensus. Intensity guidance consistently indicates rapid weakening and dissipation of the system over the Gulf of Carpentaria, primarily due to VWS.

Although animated water vapor imagery is beginning to reveal some increased subsidence over the western side of the storm, solid radial outflow persists along with a weak poleward tap. Upper level streamline analysis depicts a ridge firmly entrenched over the Gulf of Carpentaria and top end of Australia, which will keep the system under less than 20 knots of VWS along its track.

Hence the VWS values given by the guidance appear over-done, and the JTWC forecast follows a slower dissipation trend. Track confidence is high through the first 48 hours, then very low afterwards due to the uncertainty in the intensity (and hence the associated steering environment) after TAU 48

Fires Near Gulf of Carpentaria, Australia

17.7S 137.9E

April 22nd, 2013 Category: Fires

Australia – April 22nd, 2013

Fires can be seen near the Gulf of Carpentaria, in the border area between Queensland (right) and the Northern Territory (left), in Australia. Red markers show the precise locations of the fires, while the smoke emanating from them can be seen blowing in a more generalized cloud towards the southwest.

Area of Convection Over Gulf of Carpentaria, Australia

15.7S 139.0E

January 27th, 2013 Category: Tropical Storms

Australia – January 26th, 2013

An area of convection hangs over the Gulf of Carpentaria, between the Northern Territory and Queensland, Australia. Warning centers have not reported any concern over the system developing into a tropical storm. Although the convection covers the gulf, its shoreline can be seen thanks to the use of the Chelys Satellite Rapid Response System (SRRS) “borders” feature (best observed in full image).

Area of Convection Over Gulf of Carpentaria Has Medium Chance of Becoming Cyclone

January 21st, 2013 Category: Tropical Storms

Area of Convection – January 20th, 2013

Enhanced image

Track of Area of Convection - January 20th, 2013 © Univ. of Wisconsin

Track of Area of Convection

An area of convection is located near 16.6S 136.9E, approximately 425 nm southeast of Darwin, Australia.

Animated enhanced infrared satellite imagery shows a steady increase in deep convection over the northern half of a poorly defined low level circulation center (LLCC). The LLCC continues to track eastward towards the Gulf of Carpentaria, but currently remains over land. In the full image, the outline of the gulf can be observed in grey, through the convection, due to the use of the Chelys Satellite Rapid Response System (SRRS) “borders” feature.

Radar imagery from Mornington Island, Australia supports the LLCC approaching the coast. Upper level analysis indicates the LLCC is located poleward of a subtropical ridge axis and in a region of weak upper level convergence, which is hampering outflow. Observations in the vicinity of the LLCC indicate a central pressure of approximately 998 mb.

Maximum sustained surface winds are estimated at 15 to 20 knots. Minimum sea level pressure is estimated to be near 998 mb. Based on the persistent deep convection and the LLCC approaching the Gulf of Carpentaria, the potential for the development of a significant tropical cyclone within the next 24 hours is upgraded to medium.

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