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    Ocean Floor Damaged By Container Ships.

    By Andie,

    "Seafloor damage due to anchoring has far-reaching implications for already stressed marine ecosystems and carbon cycling," the researchers wrote. "As seaborne trade is projected to quadruple by 2050, the poorly constrained impacts of anchoring must be considered to avoid irreversible damage to marine habitats."



    Best historical matches to recent cold waves

    By wx_statman,

    So, I've been playing with ECMWF ERA5 reanalysis data for 1950-2021. I thought it would be fun to go through some recent cold waves and find their closest historical analogs. The criteria here is the spatial pattern of 500mb GPH between 40-60N, and 140-110W. The magnitude of the actual heights won't be the same especially if a similar pattern occurred in a different season.

    For each pattern, I will list the date which I am trying to match (in bold), followed by its closest historical matches (in order of best match):

    12/27/2021 --> 1/2/1950, 2/13/1990, 2/22/2018, 11/21/2003, 5/23/2004

    2/12/2021 --> 6/23/1993, 11/28/1985, 9/22/1955, 9/24/1986, 5/14/1986

    10/25/2020 --> 12/29/1990, 4/19/1966, 11/24/2010, 12/12/1967, 3/26/1970

    3/14/2020 --> 6/6/1980, 1/2/2017, 2/9/2019, 9/16/1954, 11/10/1985

    2/26/2019 --> 4/22/2008, 11/19/1978, 12/31/1992, 10/6/1957, 1/9/2005

    2/9/2019 --> 4/28/2009, 1/8/1993, 8/28/1951, 1/2/2017, 12/6/1972

    1/10/2017 --> 7/29/2013, 2/13/2000, 11/11/1965, 12/13/2016, 8/10/2005

    11/13/2014 --> 1/15/1957, 4/27/1958, 4/30/2009, 6/14/1969, 12/23/1983

    2/6/2014 --> 6/27/1959, 5/24/2012, 5/11/2000, 5/3/1996, 3/4/2019

    12/7/2013 --> 12/20/1998, 9/30/1950, 12/8/2009, 12/20/1990, 12/7/1972

    1/17/2012 --> 1/3/1982, 4/1/2008, 11/9/1995, 11/4/1990, 10/26/1971

    2/25/2011 --> 1/20/1962, 1/3/1974, 1/5/1993, 3/21/1954, 2/17/1993

    11/23/2010 --> 1/14/1950, 10/27/1971, 12/27/2021, 1/3/1973, 1/2/1950

    Some notes:

    -The patterns on 1/2/2017, 2/9/2019, and 3/14/2020 were all historically very similar, despite 72 years of patterns to choose from.

    -The November 2010 blast had two of its closest matches from January 1950!

    -February 12, 2021 was a weird one. 4/5 best matches were in the warm season, along with Nov. 1985 thrown in.

    -December 2013 was in legit company! Interesting that some of the biggest December blasts on record had very similar patterns. In fact, 4/5 best matches were from December despite having the entire calendar to choose from.


    Super Massive Black Hole in Center of Our Galaxy

    By Andie,

    4 million times the size of our sun.

    The center of the Milky Way galaxy, with the supermassive black hole Sagittarius A* (Sgr A*), located in the middle, is revealed in these images. As described in our press release, astronomers have used NASA’s Chandra X-ray Observatory to take a major step in understanding why material around Sgr A* is extraordinarily faint in X-rays.
    The large image contains X-rays from Chandra in blue and infrared emission from the Hubble Space Telescope in red and yellow. The inset shows a close-up view of Sgr A* in X-rays only, covering a region half a light year wide. The diffuse X-ray emission is from hot gas captured by the black hole and being pulled inwards. This hot gas originates from winds produced by a disk-shaped distribution of young massive stars observed in infrared observations.
    These new findings are the result of one of the biggest observing campaigns ever performed by Chandra.


    Blackhole 1.jpg


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