Update on Midway Atoll's Tsunami

The tsunami washed over the red-shaded areas; USFWS graphic.

Have you heard the unhappy news?  According to the USFWS's press release on Friday, March 18, "Seabird Losses at Midway Atoll National Wildlife Refuge Greatly Exceed Early Estimates."  (When you get to the link, if it doesn't show this title, you may have to put the title into the website's "Headline" box and do a search.)  Briefly, the article reports this news about albatross:

•  "...more than 110,000 Laysan and black-footed albatross chicks – about 22 percent of this year’s albatross production..." have been lost this year as a result of winter storms followed by the tsunami
• "At least 2000 adults were also killed."
• "Wisdom, the 60-year-old albatross that recently hatched a chick, was initially reported as surviving the event because her nest site was not overwashed, but biologists have not been able to confirm her survival."
• Only 4 albatross chicks have been found on the Atoll's smallest island, Spit.  Before the winter storms and tsunami, there had been 1520 albatross nests.
• Although the Short-tailed Albatross has survived all winter storms and the tsunami, the "chick's parents...have not been seen since the tsunami.  Since the chick is incapable of fending for itself, the Service will carefully consider whether hand-rearing this bird is appropriate if it is determined that it is not being fed by its parents."

Read the press release for more information about some of Midway's other birds.  The National Oceanic and Atmospheric Administration (NOAA), joins the USFWS and the state of Hawai`i in managing the Papahānaumokuākea Marine National Monument, which includes Midway and all of the NW Hawaiian Islands.  It will be NOAA's job in the months ahead to survey the tsunami's effect on the Hawaiian Monk Seal, or `Ilio-holo-i-ka-uaua, and the Hawaiian Green Sea Turtle, or Honu.

There's nothing we can do to prevent tsunamis and other natural disasters.  Even with loss of many individual birds, albatross species have survived these events before, and we expect them to survive this one, too.  

But what we can do is work to prevent human disasters on wildlife.  For example, we can be more careful about keeping plastic out of the ocean, so that albatross don't die from swallowing it by mistake.  Fishing boats can catch fish with gear that doesn't accidentally catch albatross.   

Let's try harder to protect albatross and our Planet Earth!

How Big were Midway's Tsunami Waves?

from NOAA: Height of the seawater at Midway's Sand Island during the March 10-11, 2011 tsunami.

               
Y axis is height of the seawater.                                       GMT = Greenwich Mean Time

MLLW = "the average of the lowest tide recorded at a tide station each day during the recording period," according to Wikipedia

WL = water level (I think!) __________________________________________________________________________

Midway Harbor dock; photo by Pete Leary

Around midnight Midway time (1 hour earlier than Hawai`i Standard Time) on March 10-11, 2011 Midway Atoll National Wildlife Refuge was hit by 4 tsunami waves that had been generated by an earthquake off Sendai, Japan.  US Fish & Wildlife's Susan White, the Pacific Reefs NWRC Project Leader, provided this preliminary data:

11:36 p.m. -- 1.5 feet
11:48 p.m. -- 4.9 feet
12:18 p.m. -- 4.3 feet
12:48 p.m. -- 2.2 feet

One or more of these waves washed completely over the smallest island of the Atoll, called Spit.  Over half of Eastern Island, where the World War II battle took place, was swamped.

All the people live on the Atoll's third island, Sand Island, 20% of which was covered by the tsunami waves.  Everyone was safe; before the first wave was predicted to hit Midway, they all  evacuated to the top floor of Charlie Barracks.  In the days after the tsunami, there does not seem to be much damage to Midway.

Midway's birds are not doing as well.  As Anna noted in her blog entry just below, the good news is that the Short-tailed Albatross chick has survived!  This is the second time it's been washed out of its nest cup!

About the Laysan Albatross, John Klavitter, the Acting Refuge Manager, says the death toll for adults and subadults is probably a "minimum of 1000," and "tens of thousands of Laysan Albatross chicks [were] lost."  Since the Black-footed Albatross generally live closer to the ocean, they may have an even higher death toll.   Pete at Midway's blog has pictures of albatross and other birds tangled in mud and bushes.  I think some of the pictures are sad.  But some other pictures show hard-working staff, volunteers and visitors rescuing birds...and even a lucky honu (green sea turtle)!

additional information: "Hawaii's Laysan and Black-footed Albatrosses have likely suffered heavy losses in last week's tsunami," by Dr. Lindsay Young