Tuesday, July 22, 2014

Driven by ocean heat, world sets mark for hottest June

June 2014 Blended Land and Sea Surface
Temperature Anomalies in degrees Celsius

Credit : NOAA, Global Analysis - June 2014

From ClimateCentral by Brian Kahn

The world just experienced its hottest June on record.
The heat was driven in large by part by the hottest ocean temperatures since recordkeeping began more than 130 years ago.
That makes this the third-warmest start to the year.
The global temperature was 1.3°F above the 20th century average in June according to data released on Monday by the National Climatic Data Center (NCDC).
That bests the previous hottest June record, set in 1998, by 0.05°F.
June was the 352nd consecutive month in a row with temperatures that were above the global average.
The last cooler-than-average month was February 1985, the month of “Careless Whisperer.”
The June hot streak extends back even further, with the last cool June coming in 1976 when people were grooving to Wings’ chart topper, “Silly Love Songs.”
June 2014 Blended Land and Sea Surface
Temperature Percentiles

The lengthy stretch of hot months is being driven primarily by the rise of greenhouse gases in the atmosphere.
Human activities are responsible for much of that rise and with recent carbon dioxide milestones passed, emissions show no sign of slowing.
Regionally, there were a few particularly hot spots.
Notably, New Zealand had its hottest June as did large part of East Africa and chunks of Southeast Asia.
There were a limited number of cool spots, mostly in Alaska, which baked through the first five months of the year, and far eastern Siberia.
When looking at land areas only, this was the 7th-hottest June.
Temperatures averaged over land were 1.7°F above average. 

 June Global Land and Ocean plot
It’s the ocean surface temperatures that put the month over the top.
Temperatures were 1.2°F above average.
That’s a smaller number than the 1.7°F land averages, but oceans tend to lag behind air temperatures.
And despite being a smaller number, oceans cover 70 percent of the planet, which tend to give them more weight on global temperatures.
This June represents a significant milestone for the world’s oceans.
Not only was it the hottest June for oceans since record keeping began in 1880, but it was the most anomalously warm ocean temperature for any month.
That means temperatures were more freakishly above average this past June than at any other time in the period of record.
The previous record was a four-way tie with May 2014 being the most recent month.
This June’s temperature record also represents a global mark for the warmest the oceans have ever been.
The record heat happened to hit in June, when oceans are at their warmest, giving temperatures a further boost.
The news comes on the heels of last week’s State of the Climate report, an annual climate check-up for the globe.
The report showed that 2013 saw record amounts of heat trapped in the upper half mile of the ocean, a phenomenon that scientists think is contributing to the “pause” in global warming.

Of course, talking about a “pause” is a bit of an overstatement.
This year is on track to be the third-warmest.
NCDC also said that 9 of the 10 warmest Junes have occurred since 2000 (with 1998 being the lone holdout).
El Niño, the climate phenomenon on the tip of every weather geeks’ tongue, has the potential to ratchet up the global temperature even further by year’s end.
Though there’s been an El Niño watch in place for months, the phenomenon, which is characterized by warm waters in the eastern tropical Pacific, has yet to form.
Forecasters give it a 75 percent chance of forming by fall, though, which could make the year end on a hot note.
Whether it would be enough to overtake 2010, the year of “Tik Tok,” as the hottest year on the record remains to be seen.

Monday, July 21, 2014

NZ Linz update in the Marine GeoGarage

 Coverage NZ Linz Marine GeoGarage layer

As our public viewer is not yet available
(currently under construction, upgrading to Google Maps API v3 as v2 is officially no more supported),
this info is primarily intended to
our iPhone/iPad universal mobile application users
(Marine NZ on the App Store) 
and our B2B customers which use our nautical charts layers
in their own webmapping applications through our GeoGarage API.  



6 new charts has been added in the Marine GeoGarage
(Linz July update published July 11, 2014)

  • NZ82 Tonga
  • NZ822 Vava’u Group
  • NZ827 Approaches to Tongatapu including ‘Eua
  • NZ2683 Approaches to Waitangi
  • NZ2685 Plans in the Chatham Islands - Waitangi Bay
  • NZ2687 Pitt Strait
Today NZ Linz charts (183 charts / 323 including sub-charts) are displayed in the Marine GeoGarage.

Note :  LINZ produces official nautical charts to aid safe navigation in New Zealand waters and certain areas of Antarctica and the South-West Pacific.


Using charts safely involves keeping them up-to-date using Notices to Mariners
Reporting a Hazard to Navigation - H Note :
Mariners are requested to advise the New Zealand Hydrographic Authority at LINZ of the discovery of new or suspected dangers to navigation, or shortcomings in charts or publications.

Boom in satellite ship tracking

Fugro Equator tracks
The Fugro Equator has a state-of-the-art multibeam echosounder to map the ocean floor

From BBC by Jonathan Amos

The ship tracks recorded on this map are unmistakably those of a survey vessel moving back and forth on a grid.
They were produced by Fugro Equator, one of the ships currently making a detailed map of the ocean floor west of Australia as part of the search for wreckage from the lost Malaysia Airlines flight MH370.

With satellite AIS, ships like Fugro Equator can be tracked anywhere on the oceans

The Dutch-owned Fugro Equator, together with the Chinese PLA-Navy ship Zhu Kezhen, which is working further to the south, are gathering bathymetric (depth) data over an area covering some 60,000 sq km.
Once this is in the hands of Australian authorities, the hunt for MH370 will go into a new phase, using a range of submersibles and other deepwater search technologies.

The Fugro Equator has recently returned to its mapping operation after a period in port

The maps on this page were recorded by ExactEarth, one of a growing number of suppliers of ship tracking information acquired from space.
ExactEarth, a subsidiary of Canadian satellite component manufacturer ComDev, has a small constellation of sensors in orbit that can detect the Automatic Identification System (AIS) signals broadcast by ships.

Planned exactEarth satellite constellation

All vessels over 300 gross tons (and all passenger ships irrespective of size) are mandated to carry transponders that push out data that includes not just position, course, and speed, but also information about a ship's type, draught, cargo - even its eventual destination.

AIS was established in the first instance as a safety system - something maritime agencies and ship operators themselves could use to keep tabs on who was doing what in local waters.
But the curvature of the Earth means the terrestrial radio network only works within about 75km of the shore, which then requires satellite observation to follow vessels out on the open ocean.
The data has myriad applications including for optimizing routing, enforcing fisheries rules, tracing pollution and tackling piracy and smuggling.

 AIS in South Asia

ExactEarth is just one company exploiting this new market.
This week at the Farnborough International Airshow, it signed a deal to commercialise new detection technology developed within a European Space Agency telecommunications project.
The technology will be installed on two satellites to be manufactured by LuxSpace of Luxembourg.
"There are many challenges with satellite AIS since the signals were never meant to be received from space," said Peter Mabson, president of exactEarth.
"The biggest one is that the satellites will receive transmissions from many, many vessels - up to thousands of vessels - simultaneously. So the big challenge is the signal processing challenge of being able to make sense of all that information. From exactEarth's point of view, we have a patented way to do that."


Burgeoning market

Tuesday's contract was signed just a day after Orbcomm, a US rival to exactEarth, put up six new AIS satellites; and a week after a Soyuz rocket lofted separate AIS platforms for the Russian/German satellite builder Dauria Aerospace and for the Norwegian space agency.


The Norwegian platform, AISSat-2, is a follow-up to the highly successful spacecraft the Scandinavian country launched in 2010.
Norwegian space agency director-general Bo Andersen credits AIS information, some of it from AISSat-1, for helping to enforce a highly successful cod fishery that has not seen any recorded illegal activity so far this year.
"Norway has the biggest ocean area of any country in Europe," he explains.
"The ocean area is slightly bigger than the whole of the Mediterranean. What's more, it is so far to the north that in summertime, 60% of all the traffic north of the Arctic Circle is in Norwegian waters, and in wintertime it is 90%. And if you go up to the 'real Arctic', which is about 73 degrees North, we see days when all the traffic in the Arctic is in Norwegian waters."
An AISSat-3 will be launched in about a year to supplement the observations of all this traffic.

Aviation has a situational awareness system that is similar in many ways to AIS.
It is called Automatic Dependent Surveillance-Broadcast (ADS-B).
It too will provide identification and tracking information through ground radio networks and satellites.
In the case of MH370, however, the ADS-B transponder on the Malaysia Airlines jet was either switched off or failed.

Links :

Sunday, July 20, 2014

'Exhale' - A must watch for all freedivers



Slowly sinking to the bottom of the ocean floor, an unconscious Aaron Gallagher was rescued by his diving partner, and best friend Jack Strickland.
After suffering what is referred to as a 'shallow water blackout' the horrific images of a man moments from death were caught on camera.
What followed was a long road to recovery, as the two men fought against the physical and emotional trauma sustained on that fateful day.
Exhale is a hard-hitting film about the extreme sport that is free diving, delve deeper and we find a story of friendship, passion and overcoming all fears.

Links :