I went for a swim this morning in deep water in the middle of the South Pacific. Twelve-thousand-feet deep. The sea was lumpy, with six-foot swells running towards Hawaii, a couple thousand miles to the northeast. Using just a mask and snorkel, no fins, peering into the depths I tried to imagine what was below. It gets dark fast just below the surface despite the bright sunlight, which leaves everything to the imagination. That’s the wonder of the ocean; even its most expert fans have very little idea what lies two miles below. When it’s suggested that everything’s been “explored” or “discovered,” I put on a mask and try and see into the deep ocean. There’s a lot down there we have no idea about and I wonder if we ever will.
Swimming in a wild ocean without fins is eye opening. A little scary. It made me wonder how long I could last out here on my own and have to admit I got out of the water not feeling superbly confident. An hour, maybe? Bobbing about, treading water, maybe taking a few strokes? It’s not how I would choose to go … but whenever I’m out in it I have to admit to the same thought running through my head. What would it be like to never climb out of the ocean, to truly be lost at sea?
I also thought about just how warm the middle of the ocean feels, empirically speaking. But it’s true, the ocean is warming and there are statistics to back that up. My colleague Alex Nelson sent this note this morning: According to the National Oceanic and Atmospheric Administration (NOAA), the temperature of the world’s oceans reached a new high in July. The ocean’s surface temperature peaked at 63.1 degrees Fahrenheit, besting the old record — set just the month before.
The implications are enormous. Ocean surface temperatures affect the size and power of hurricanes. This year’s hurricane forecast is optimistic, with Colorado State University predicting 11 named storms, only five of them hurricanes. NOAA expects 9 to 14 storms, providing marginal relief from last season’s anomalous 16 storms.
The greatest impact of this worldwide warming is on the polar ice caps. Last September, for the first time in recorded history the North Pole became an island. Ever-rising water temperatures melted the ice that has always connected the landmass to northern Canada and Russia. The agency also said that, on average, Arctic sea ice covered 3.4 million square miles in July, 12.7 percent below the 1979-2000 average and the third lowest on record – after 2006 and 2007. While this development was an unexpected boon for shipping companies eager to cut down on travel time, it represented a grave manifestation of the effects of global warming. Sea levels have been rising 50% faster than the United Nations predicted in 2007 and are expected to gain at least a full 39 inches by 2100.
The UN is holding a summit in December in Copenhagen to draft a treaty addressing climate change issues. The 180 countries expected to attend will set limits for gas emissions and deforestation in an effort to combat the effects of global warming.