Puget Sound Orca Fatality: Canadian naval exercises may be a root cause

The National Oceanic and Atmospheric Administration (NOAA) is conducting an investigation into the death of an Orca, aka Killer Whale, that was found bruised and bleeding on a Washington state shoreline in early February. Test are being conducted to determine the exact cause of death but one likely candidate, according to several whale conservation groups, is Canadian naval war games - including the use of underwater sonar - that took place nearby just a few days prior to the orca washing ashore at Puget Sound.

As reported by the QMI Agency for Canada's IFPress.com, Brian Gorman of NOAA said, "We take really seriously any kind of injury, or certainly death, in the population, as there are so few animals. They don't interbreed to any great degree...so if you lose one or two animals, it's a serious threat to the overall health of the population."

The dead orca was a member of a pod of endangered orcas that ply the waters between Washington state and British Columbia. The pod consists of only 90 whales and are protected by the Endangered Species Act and Marine Mammal Protection Act - at least when they are in US waters.

According to the Center for Whale Research, the pod was spotted soon after the Canadian naval exercise began in waters much further south than normal for these whales. Something was driving them southward.

"HMCS Ottawa [the frigate involved in the exercise] used its sonar system in critical habitat of the endangered southern resident killer whales," the Center for Whale Research said. "The unprecedented appearance of these whales in these waters...suggests that southern residents were present in the area — and may have been significantly affected by the exercise."

Canada has implemented tighter restrictions regarding proximity of whale watching boats and other vessels, limiting them to a distance of 200 meters from any sighted orcas. However, the new regulations do not apply to Canadian military vessels.

Although US naval activities are often a source of controversy, particularly with regards to powerful underwater sonar, Gorman noted that US navy vessels have an established protocol. "There are, however, arrangements we have with our navy about making sure that when they are conducting activities that could cause a problem with marine mammals that they post a lookout and not conduct these activities when marine mammals are present within a certain distance."

Source: ILPress.com

Ocean Dead Zones: low oxygen areas are still growing

Ocean researchers and many conservationists have heard of oceanic low-oxygen or "dead zones" wherein large areas of ocean have lower-than-normal levels of oxygen. To a large extent, these areas are normal or somewhat predictable - deepwater and seasonal movements of water; all part of the ocean's normal process of oxygen intake, use, and replenishment.

But there are more and more signs from throughout the world that these dead zones are becoming more frequent and growing in size. From both coasts of Africa, to South America to the Pacific Northwest, dead zones are becoming a real problem, killing off some aquatic species, displacing others, and affecting the ocean's relationship with the atmosphere - a relationship that provides a majority of our breathable air.

A recent article in the online McClatchy newspaper outlines what has been happening in the Pacific Northwest, along the Oregon/Washington coastline. Some scientists believe it's too soon to tell whether the root cause - a warming of the surface waters that acts as a cap to suppress the normal cycle of deepwater to shallow, or upwellings and downwellings - is due to global warming, but it's high on their list of suspects.

Some might think that it's a sign of ocean acidification, but this is a different process taking place here, as well illustrated in the article. However, in any case, the net effect of the coast of Oregon and Washington is tangible, with piles of dead Dungeness crab and 25-year old sea stars littering a sea floor covered with a higher-than-normal bacteria layer.

"Areas of hypoxia, or low oxygen, have long existed in the deep ocean. These areas — in the Pacific, Atlantic and Indian oceans — appear to be spreading, however, covering more square miles, creeping toward the surface and in some places, such as the Pacific Northwest, encroaching on the continental shelf within sight of the coastline.

'The depletion of oxygen levels in all three oceans is striking,' said Gregory Johnson, an oceanographer with the National Oceanic and Atmospheric Administration in Seattle."

If these low-oxygen zones continue to increase in size and/or frequency, the ocean ecology will have to make adjustments, some that will be severe and that we will feel as they impact commercial fisheries. But scientists are not sure just how far-ranging these changes could be. After all, they have no reference models or examples to turn to - we are heading into unknown territory.

"Scientists are unsure how low oxygen levels will affect the ocean ecosystem. Bottom-dwelling species could be at the greatest risk because they move slowly and might not be able to escape the lower oxygen levels. Most fish can swim out of danger. Some species, however, such as chinook salmon, may have to start swimming at shallower depths than they're used to. Whether the low oxygen zones will change salmon migration routes is unclear.

Some species, such as jellyfish, will like the lower-oxygen water. Jumbo squid, usually found off Mexico and Central America, can survive as oxygen levels decrease and now are found as far north as Alaska."

Read entire McClatchy article.

Lenticular Clouds: Mt. Rainier's extra-terrestrial weather forecaster

Ever seen a UFO hovering over the mountain tops? I mean, ever seen lenticular clouds floating over the mountain tops? Not to diss those who believe we have been visited by extra-terrestrial travelers, but these unique cloud formations (sometimes mistaken for UFOs) are worthy of note as one of nature's phenomenons and often an indicator of a change in the weather.

Lenticular clouds are formed when stable moist air moves over mountains forming what is called a standing or "lee" wave. If the top of the wave gets below the dew point, then the moisture can form into these unusual cloud formations.

In Washington, the locals at Mt. Rainier look to these cloud formations as an indicator of coming rain, as the moisture and wind patterns required to produce lenticular clouds over Mt. Rainier often precede a storm by 24-hours. The clouds pictured above occurred last Friday, but the weekend turned out to be sunny at the mountain.

Well, looks like the folklore weather forecasting is about as reliable as the UFO reports. But the clouds look great, anyway.