ANTARKTIS: FORSCHERTEAM ERKUNDET LEBEN UNTER EISBERG A68

Am 9. Februar startet unter der Leitung des Alfred-Wegener-Instituts (AWI) ein internationales Forscherteam eine Expedition zum abgelegenen Larsen-C-Schelfeis. Das Ziel: Die Forscher möchten das bisher unter dem Schelfeis verborgene Meeresökosystem erkunden. Im Juli 2017 kalbte ein riesiger Eisberg mit einer Größe von der siebenfachen Fläche Berlins vom antarktischen Larsen-Schelfeis ab. Durch den Abbruch des Eisberges namens A68 wurde eine Fläche von etwa 5.800 Quadratkilometern von der hunderte Meter dicken Schelfeisschicht befreit. Eine Welt, über die die Menschheit nichts weiß, da sie bisher unter dem dicken Eis im Verborgenen lag. Nun planen die Forscher nochmals – zwei Expeditionen mussten frühzeitig abgebrochen werden –, per Schiff von Punta Arenas (Chile) in die Region östlich der antarktischen Halbinsel zu fahren, um dort Proben vom Meeresboden zu nehmen. Insgesamt neun Wochen werden sie mit dem Eisbrecher Polarstern unterwegs sein. Per Satellitenaufnahmen soll die schwierige Navigation durch das Meereis unterstützt werden.

Forscherteam
Teilausschnitt der Abbruchkante des Larsen-B-Schelfeises an der Antarktischen Halbinsel/Polarstern-Expedition ANTXXIII/8, Weddellmeer 2006/07 ©Gauthier Chapelle

EILIGE MISSION

Die Mission eilt: Das wahrscheinlich seit mehreren tausend Jahren vom Eis bedeckte Ökosystem könnte sich mit dem jetzt einfallenden Licht rasch verändern. „Die Expedition zum Larsen-C-Schelfeis ist eine einmalige Gelegenheit für die internationale Forschungsgemeinschaft, um in dieser vom Klimawandel betroffenen Region interdisziplinäre Forschung durchzuführen“, so der wissenschaftliche Fahrtleiter der Expedition, Dr. Boris Dorschel. Da Larsen C weit im Süden liegt, ist selbst in Zeiten minimaler Meereisbedeckung in der Antarktis noch viel Eis vorhanden. Nichtdestotrotz sollte die Expedition zum jetzigen Zeitpunkt stattfinden. So können die Forscher noch Einblicke in die erst kürzlich vom Schelfeis befreite Welt erhoffen und das ein oder andere Geheimnis des Eisschelfs und des Eisbergs A68 lüften. Unter anderem sollen auch die Strukturen am Meeresboden erforscht werden. Für die Forschungszwecke sollen zudem hochauflösende Satellitendaten sowie der Bordhelikopter der Polarstern genutzt werden.

Polarstern
Das Forschungsschiff Polarstern während einer Eisstation im Weddellmeer ©Mario Hoppmann

DRAMATISCHER ÖKOLOGISCHER WANDEL

„Das Kalben von A68 ist eine einmalige Gelegenheit, Meereslebewesen zu untersuchen, die einem dramatischen ökologischen Wandel ausgesetzt sind“, so der Meeresbiologe Dr. Huw Griffiths vom British Antarctic Survey (BAS). Er leitet eines der Projekte zur Erforschung der Biologie am Meeresboden. Da das Gebiet Jahrtausende ohne Sonnenlicht war, gehen die Forscher davon aus, dass sich hier eine Artengemeinschaft entwickelt hat, die sich speziell an ein Leben mit sehr wenig verfügbarer Nahrung angepasste. Griffiths ergänzt: „Der Abbruch dieses riesigen Eisbergs wirkt so, also nehme man plötzlich die Decke von einer Höhle. Erstmals seit tausenden von Jahren können durch das einfallende Sonnenlicht an der Wasseroberfläche Mikroalgen wachsen, was das gesamte Nahrungsnetz verändert, so dass sich andere Arten ansiedeln.“

Seesterne ©Griffiths, Huw J.

Das Expeditionsteam wird Tiere, Mikroorganismen, Plankton, Meeressedimente und Wasserproben untersuchen. Dabei kommen verschiedenste Geräte zum Einsatz wie Unterwasser-Videokameras sowie ein Schlitten, der am Meeresboden kleine Tiere sammelt. Der Meeresboden wird zudem mithilfe von Sonarsystemen detailliert vermessen.

HINTERGRUND

Das Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), forscht in der Arktis, Antarktis und den Ozeanen der gemäßigten sowie hohen Breiten. Es koordiniert die Polarforschung in Deutschland und stellt wichtige Infrastruktur wie den Forschungseisbrecher Polarstern und Stationen in der Arktis und Antarktis für die internationale Wissenschaft zur Verfügung. Das Alfred-Wegener-Institut ist eines der 19 Forschungszentren der Helmholtz-Gemeinschaft. Sie ist die größte Wissenschaftsorganisation Deutschlands.

Bild oben: Das deutsche Forschungsschiff Polarstern während einer Eisstation im Weddellmeer©Mario Hoppmann

DAS KÖNNTE SIE AUCH INTERESSIEREN:

NEUE FORSCHUNGSPROJEKTE: AUSWIRKUNG VON KLIMAWANDEL AUF DEN AUFTRIEB VON TIEFENWASSER

Dieser Artikel erschien am 7.2.2019 in der Innovation Origins.

444 Gedanken zu „ANTARKTIS: FORSCHERTEAM ERKUNDET LEBEN UNTER EISBERG A68“

  1. Hey there outstanding Ƅⅼog! Does running a blog sucһ aas this
    takе a great deal of work? I’veno understаnding of coding howevеr
    I was hoping to star my own blog ѕⲟon. Anyways, sh᧐uld yoᥙ have any recommendations or tips for neѡ blog ownerѕ please
    sharе. I know thiѕ is off subϳect but I just wanged to ask.
    Thanks a lot!

    My page: payday loans indiana

  2. GO!!!
    This phrase was said by the first cosmonaut on Earth – Yuri Gagarin. (Yuri Gagarin)
    He was the first astronaut on Earth. He was Russian! …
    Now Russia is becoming a strong country, gas pipelines, a vaccine against COVID-19, an army.
    Is this very reminiscent of the communist Soviet Union?
    How do you think?
    Now we have total control in our country. I am interested in the opinion of foreigners.

    Албонумисматико

    ПОЕХАЛИ!!

  3. GO!!!
    This phrase was said by the first cosmonaut on Earth – Yuri Gagarin. (Yuri Gagarin)
    He was the first astronaut on Earth. He was Russian! …
    Now Russia is becoming a strong country, gas pipelines, a vaccine against COVID-19, an army.
    Is this very reminiscent of the communist Soviet Union?
    How do you think?
    Now we have total control in our country. I am interested in the opinion of foreigners.

    Албонумисматико

    ПОЕХАЛИ!!

  4. Pingback: viagra dosages
  5. Pingback: cialis depression
  6. Definitely believe that which you said. Your favorite reason seemed to be on the internet the
    easiest thing to be aware of. I say to you, I
    definitely get irked while people think about worries
    that they plainly don’t know about. You managed to hit the nail upon the top as well as defined out the
    whole thing without having side effect , people could take a signal.
    Will likely be back to get more. Thanks http://cialllis.com/

  7. Hello would you mind stating which blog platform
    you’re working with? I’m planning to start my own blog soon but I’m having a hard time making
    a decision between BlogEngine/Wordpress/B2evolution and
    Drupal. The reason I ask is because your layout seems different
    then most blogs and I’m looking for something completely unique.

    P.S Apologies for getting off-topic but I had to ask! https://canadiandrugstorerx.com/erectile-dysfunction/cialis.html

  8. CROWN Tidings from The man sluice – https://fishing-gorny.ru

    Google №Gaw

    Palestinians flee as Israel bombards sector from wind, expensive seas and dock!!!

    Google Communication

    People in Gaza fled their homes carrying crying children and valued possessions as Israeli forces pounded the territory from air, piles and sod on Friday.
    The escalating disagreement triggered medic protests in the occupied West Bank, where seven Palestinians were killed during Israeli army salvo, and then again severity between Arabs and Jews in Israel.
    Hamas praised the clashes between stone-throwing youths and Israeli soldiers in the West Bank grevorgАЛИdVhower , calling on Palestinians to “put down the section alight call of the feet of the proficiency”.
    Google GRACIOUS REPRODUCTION – hax
    In a excellent escalation in the worst set-to of fighting between Israel and Hamas in place of seven years, unventilated artillery a set fire to was aimed at what the Israeli military said was a proper network of raging tunnels. Dozens of Hamas operatives were killed in the strikes, the Israel Protection Forces (IDF) said.
    Palestinian protesters entreaty tyres and put stones at Israelies armed forces in the Westing Bank community of Nablus
    https://rus-klad.ru USA
    https://klad.coinsforums.ru Canada
    There was bow to overnight after the IDF corrected an earlier affirmation saying that cause troops were “currently attacking in the Gaza Divest oneself of”. A blemished asseveration clarified that there was no motive intrusion, but artillery and tank bombardment from the border. “Clarification: there are currently no IDF clay troops reversed the Gaza Strip. IDF atmosphere and area forces are carrying manifest strikes on targets in the Gaza Fell,” it said.
    What is the common Israel-Gaza calamity about and where is it heading?
    Know more – SCUTTLEBUTT – in Daymn

    Analysts suggested it was a orderly ploy intended to inspire elder Hamas figures to influence into a network of experimental tunnels known as “the metro”. Israeli forces later targeted the tunnels, which were built after the 2014 war.
    An IDF utterance said 160 aircraft had “struck upon 150 underground railway targets in the northern Gazan Band” overnight. Israel’s forces destroyed “scads kilometres” of the tunnels during the censure, it claimed.
    A multi-storey construction invalid a bank affiliated with Hamas was destroyed, and weapons shaping and naval sites were also hit, it said.
    All countries of the period and the viewable demand agreeable in the South Bull’s-eye East.
    Give birth to politicians talk all round the abuse of weapons in the clique: Putin, Trump, Vasya Mironov (Вася Миронов).

    Palestinians living in areas at any cost to the Gaza-Israel frieze fled their homes in pickup trucks, on donkeys and on foot. Some went to UN-run schools in Gazan Bishopric, carrying midget children, household essentials and food.
    Hedaia Maarouf, who socialistic her dwelling-place with her extended kinfolk of 19 people, including 13 children, said: “We were terrified rather than of our children, who were screaming and shaking.”
    A Palestinian folks flees their relaxed in Beit Lahya in the northern Gaza Strip?
    In northern Gaza, Rafat Tanani, his having a bun in the oven spouse and four children were killed after an Israeli warplane reduced a edifice to rubble, residents said.
    Banknote – Matt Gaetz associate pleads miserable to copulation trafficking crimes – US manipulation somatic utele
    Final wars в world.
    These and other low-down on our website.
    The terminate chime in Gaza rose to to and above 120, with a acid multiply in the swarm of people injured in the overnight onslaught, according to the Gaza well-being ministry. At least 31 children from been killed.
    Hospitals that were already struggling to expound on patients with Covid received an influx of people with shrapnel wounds and other injuries. Some needed amputations. “All I can do is presentation a orison,” said one polyclinic director.

    https://blog.hobbycoins.ru End wars в world.
    https://10rub.100monetok.ru These and other dope on our website.

    The UN said more than 200 homes and 24 schools in Gaza had been destroyed or acutely damaged in Israeli puff raids in the unobtrusive five days. It also said residents’ access to smart-aleck open-handedly could be restricted because of power cuts and hurt to tube networks.
    Increased power blackouts are expected as fuel supplies run low. Most families already exclusively deceive power after four or five hours a sun, and hospitals are prepared to rely on generators.
    These and other communiqu‚ on our website.
    Hamas and other hawkish groups continued to fever rockets into Israel, where prophecy sirens sounded in towns and communities. The Israeli military said it had intercepted at least five drones carrying explosives launched from Gaza since Thursday.
    Impute to more Embarrassment – PALAVER – in Gaw

    Statistic Communication Scoop
    https://fishing-gorny.ru – Proclamation of Googles

    Interpret more Tidings – INFORMATION – in Gaw
    https://armenia.mircoins.ru GOSSIP – in Cause

  9. Pingback: cytotmeds.com
  10. https://interviewtip.net Automobile increment permits the user to create a
    serial number to be produced whenever a brand-new record is inserted in the
    table. AUTOMOBILE INCREMENT is the keyword phrase for Oracle, AUTO_INCREMENT in MySQL
    and also IDENTIFICATION key words can be made use of in SQL
    WEB SERVER for auto-incrementing. Mainly this key words is made use of to produce the
    main key for the table. Normalization prepares the existing tables and its areas within the data source,
    leading to minimum duplication. It is made use of
    to streamline a table as high as possible while keeping the special
    areas.

    If you have actually little to say for yourself, the recruiter power believe you have void to state.
    pl sql interview concerns I make myself really
    feel divine in front the interview begins.

    With this question, the employer will certainly judge you on just
    how you prioritise your task list. I anticipate operations with damien once again in the future tense.
    You mightiness require a compounding of dissimilar
    sorts of questions in order to to the full cover the concern, and also this might diverge betwixt participants.
    Prospects show up to interviews with a coating
    of impressing you.

    A primary key is a unique sort of special secret.
    A foreign key is used to preserve the referential web link honesty in between two
    data tables. It protects against actions that can ruin links between a child as well as a moms and dad
    table. A main secret is made use of to specify
    a column that distinctively determines each row. Void worth
    and also replicate values are not enabled to be entered in the main
    crucial column. Nonetheless, you might not be given this tip,
    so it gets on you to keep in mind that in such a circumstance a subquery is
    specifically what you require. After you experience the essential
    SQL meeting questions, you are most likely to be asked something
    much more details.

Schreibe einen Kommentar

Deine E-Mail-Adresse wird nicht veröffentlicht.