Navy environmental rules relaxed for
Arctic operations because
of global warming
3 hours ago
OTTAWA (CP) — The Canadian navy is relaxing some pollution rules for warships plying Arctic waters after skippers warned their ships were at risk of becoming smelly garbage scows.
Instead of having to carry all waste food on deck for eventual disposal at port, the ships will be allowed to dump it at sea.
The changes “help alleviate our COs (commanding officers&rsquo
concerns (with regard to) accumulated food remnants stored in garbage bags on decks during ever-increasing global warming summers,” says an internal memo, obtained by The Canadian Press under the Access to Information Act.
“These food remnants may decay or putrefy and generate an occupational health and safety issue on board ships (that) our COs can ill afford while striving to enforce Canadian sovereignty in our internal Arctic waters.”
The revamped orders, expected this fall, would also allow Canadian ships to dump raw sewage offshore in the Arctic and even to toss garbage bags overboard if there are “operational” reasons for doing so.
“If the above instructions and limits cannot be met for operational or safety reasons when at sea and the ship’s holding capacity is about to be exceeded, then garbage shall be made negatively buoyant prior to discharge and released at the farthest practical point from land,” says a proposed revision.
Military-source pollution in the sensitive Arctic environment is becoming a navy headache as the federal government sends more warships north on sovereignty patrols in a region already under assault from global warming.
“Any new flora, fauna or pollution in our Arctic internal waters carries a risk to adversely impact its embattled ecosystem, as the intensity of past climate limitations gradually decline due to escalating global warming,” says a draft version of the new orders.
Reliably cold temperatures once helped naval commanders deal with the garbage problem through freezing, but warmer weather is changing protocols.
Now, the new orders will allow “moderate amounts” of pulped-food waste - once banned from disposal in the Arctic - to be dumped if a ship is at least 12 nautical miles or about 22 kilometres from shore.
The orders will also allow raw, untreated sewage to be flushed into the sea at the same minimum distance and, to help dispersal, only while the ship is moving at a moderate clip.
Previously, the navy banned the disposal of raw sewage in Arctic waters but the new orders will reflect the more relaxed provisions of the Arctic Water Pollution Prevention Act.
Submarines, which have highly limited storage capacity for waste, are being given even more leeway, including a provision allowing oily bilge water to be flushed directly into the ocean. However, all of Canada’s four new Victoria-class subs are being equipped with technology that will remove oil from bilge water, making the problem moot.
All Canada’s warships are technically exempt from the Canada Shipping Act as well as from other laws with environmental restrictions, although navy ships are legally bound to comply with ecosystem protections under the Fisheries Act.
However, senior brass have ordered that the fleet will nevertheless act as though all federal environmental legislation applied to navy operations, with exceptions for emergencies and operational restrictions.
The problem in the Arctic is that the only major port facility for offloading garbage and sewage is Iqaluit, and waste matter can overwhelm the storage capacity of ships during extended missions.
At the same time, Ottawa is ordering more ships north to bolster Canada’s Arctic sovereignty claims. In August, for example, the 10-day Operation Nanook involved three navy vessels - including a submarine, HMCS Corner Brook, the first time a Canadian sub has participated in such an operation.
Navy spokesman Cmdr. Jeff Agnew said the recent revisions to pollution-prevention orders simply reflect changes in civilian law, and allow ships’ commanders more flexibility.
“Notwithstanding that we’re less restrictive than we used to be, we are far more restrictive than the law requires us to be,” he said in an interview. “It’s good stewardship.”
Another spokesman noted the navy is in the Arctic partly to be able to react quickly to environmental disasters.
“One of the components of Operation Nanook was responding to an environmental crisis, and it’s only by being up there that we’re going to be able to respond to environmental crises caused by increased traffic in the region,” said Lt. Jordan Holder.
A spokesman for the Sierra Club of Canada said the melting Arctic - already under pressure - can ill afford any more pollution.
“Having to take waste to a port to be properly disposed of is worth the inconvenience . . . rather than dumping it into our newly exposed ocean,” said Jamie Kirkpatrick from Toronto.
“We’re no longer in an era where you can say the solution to pollution is dilution.”
Consequence: warmer temperatures
Average temperatures will rise, as will the frequency of heat waves.
Consequence: drought and wildfire
Warmer temperatures could also increase the probability of drought. Greater evaporation, particularly during summer and fall, could exacerbate drought conditions and increase the risk of wildfires.
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| Greater evaporation as a result of global warming could increase the risk of wildfires. |
Consequence: more intense rainstorms
Warmer temperatures increase the energy of the climatic system and lead to more intense rainfall at some times and in some areas.
HEALTH EFFECTS
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| More frequent and more intensive heat waves could result in more heat-related deaths. Photo: Gary Braasch, Chicago, July 1995. See the World View of Global Warming website for more Gary Braasch photos illustrating the consequences of the changing climate. |
Consequence: deadly heat waves and the spread of disease
More frequent and more intensive heat waves could result in more heat-related deaths. These conditions could also aggravate local air quality problems, already afflicting more than 80 million Americans. Global warming is expected to increase the potential geographic range and virulence of tropical diseases as well.
WARMING WATER
Consequence: more powerful and dangerous hurricanes
Warmer water in the oceans pumps more energy into tropical storms, making them more intense and potentially more destructive.
Consequence: melting glaciers, early ice thaw
Rising global temperatures will speed the melting of glaciers and ice caps, and cause early ice thaw on rivers and lakes.
![]() | ||||
| The satellite photo at far left shows the Larson B ice shelf on Jan. 31, 2002. Ice appears as solid white. Moving to the right, in photos taken Feb. 17 and Feb. 23, the ice begins to disintegrate. In the photos at far right, taken Mar. 5 and Mar 7, note water (blue) where solid ice had been, and that a portion of the shelf is drifting away. Photos: National Aeronautics and Space Administration | ||||
Consequence: sea-level rise
Current rates of sea-level rise are expected to increase as a result both of thermal expansion of the oceans and of partial melting of mountain glaciers and the Antarctic and Greenland ice caps. Consequences include loss of coastal wetlands and barrier islands, and a greater risk of flooding in coastal communities. Low-lying areas, such as the coastal region along the Gulf of Mexico and estuaries like the Chesapeake Bay, are especially vulnerable.
ECOSYSTEM DISRUPTION
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| Warmer temperatures may cause some ecosystems, including alpine meadows in the Rocky Mountains, to disappear. |
Consequence: ecosystem shifts and species die-off
The increase in global temperatures is expected to disrupt ecosystems and result in loss of species diversity, as species that cannot adapt die off. The first comprehensive assessment of the extinction risk from global warming found that more than one million species could be committed to extinction by 2050 if global warming pollution is not curtailed. Some ecosystems, including alpine meadows in the Rocky Mountains, as well as tropical montane and mangrove forests, are likely to disappear because new warmer local climates or coastal sea level rise will not support them.
Hurricanes and global warming - a link? | |||||
resident of the world's most powerful nation. Add two intense and damaging natural storms which bring destruction to that country; then mix in the widely held view that the same nation's environmental policies are partially responsible for those storms. In the polarised world of climate change, this cocktail has proved an irresistible temptation to organisations which campaign against President Bush's administration in support of enhanced action to curb greenhouse gas emissions. The latest to succumb was the British newspaper The Independent, which screamed on its front page: "This is global warming", above an alarmingly portentous graphic of Hurricane Rita's projected path. But is it global warming? What is the evidence that the growing concentrations of carbon dioxide and other greenhouse gases in the atmosphere are changing weather systems in such a way that hurricanes become more powerful, or more frequent? Well above average Certainly, 2005 appears to have been an unusually active year. The US National Hurricane Center/Tropical Prediction Center comments in its August summary that "thus far in 2005, there have been 12 named storms and four hurricanes. "These numbers are well above the long-term averages of 4.4 storms and 2.1 hurricanes that would normally have formed by this date." But a single year's observation does not permit the divination of a long-term trend, or the attribution of that trend to a cause such as climatic warming. "Based on recent research, the consensus view is that we don't expect global warming to make a difference to the frequency of hurricanes," explains Julian Heming, from the UK Meteorological Office. "Activity is naturally very variable in terms of frequency, intensity and regional occurrence; in the Atlantic, there are active phases and not so active phases, and currently we're in the middle of an active phase. "It's very dangerous to explain Rita or Katrina through global warming, because we have always had strong hurricanes in the USA - the strongest one on record dates back to 1935." Regular changes Records from the 20th Century suggest that hurricane formation over the Atlantic has changed phase every few decades: the 1940s and 50s were active, the 70s and 80s less so, while the currently active phase appears to have commenced in 1995. A key factor in the formation of a tropical cyclone - a low-pressure region that can turn into a hurricane - is sea-surface temperature, which has to be above about 27 degrees Celsius.
ecent study on the issue, published this month in the journal Science, found that while the incidence of hurricanes and tropical storms has remained roughly constant over the last 30 years, there has been a rise in the number of intense hurricanes with wind speeds above 211km/h (131mph). The leader of that research project, Dr Peter Webster, believes there may be a link to climate change. "What I think we can say is that the increase in intensity is probably accounted for by the increase in sea-surface temperature," he told the BBC News website, "and I think probably the sea-surface temperature increase is a manifestation of global warming." "The problem is," observes Julian Heming, "that we can only look back about 35 years with satellite data; before that the record is somewhat unreliable, and 35 years isn't long enough to draw a definite conclusion. "Before global satellite coverage, we're pretty sure there are gaps in the record; storms would start at sea and die out at sea, so we never knew about them." Global connections The changing phases of Atlantic hurricane activity are not completely understood; but there appears to be a link to fluctuations in the thermohaline circulation, the global pattern of ocean currents which in western Europe appears as the Gulf Stream. By causing the sea-surface temperature in the tropical Atlantic to change by even a degree Celsius, these fluctuations can bring major differences to the number of hurricanes generated in a particular year. Other natural climate cycles such as the El Nino Southern Oscillation and the North Atlantic Oscillation may also play a role. The other crucial factor with Katrina and Rita is where they landed. Some hurricanes never reach land; others will hit a sparsely-populated area, causing minimal damage. > ight="250" alt="Bar chart showing hurricane land strikes (Noaa)" src="http://newsimg.bbc.co.uk/media/images/40843000/gif/_40843284_hurricane3_history_gra416.gif" width="416" border="0" /> This also appears to be determined by weather systems, in particular the location of a region of high atmospheric pressure, the sub-tropical ridge. "In the Atlantic, storms form in the east and move towards the west," says Julian Heming, "and at some point they turn northwards. "Where they turn northwards has much to do with the weather conditions further north; 1995, for example, was a very active season with 19 named storms, but the US got away very lightly because the sub-tropical ridge did not extend right across the Atlantic, and many storms turned north before reaching the US. "Last year it did extend across the Atlantic, and so hurricanes were forced much further west - hence Ivan, Jean, Charlie and Francis all hit the US." Bigger and bolder Every time a hurricane comes along - or a flood, or a drought, or a freeze, or a heatwave - the question is now asked "is it linked to global warming?" A decade ago, that was not the case - a clear signal that climate change is now firmly established in the public mind and in the political arena.
m is that not all of those answers exist. Another problem is that some scientists - not to mention lobby groups, environmental organisations, politicians, newspapers and commentators - will go much further in their public statements than the data allow. With such incendiary material, that is unlikely to change; but it is difficult to avoid the conclusion that we would all benefit from people on both wings of the issue looking rather more to research, however laboured its progress, and rather less to screaming headlines and easy quotes.
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