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  1. Apr 22

    On , a reminder that the biggest uncertainty in predicting sea-level rise to the end of this century and beyond is how the Ice Sheet will respond to climate change, particularly in West Antarctica, where the most imminent concern is

    34 retweets 98 likes
  2. 2 hours ago

    “The observed -ice expansion and model-observation discrepancy have perplexed climate over more than a decade." ||| Spending 10 years trying to fit observations into a model that doesn't reflect the observations.... Science™!

  3. Apr 22

    On just gentle reminder that what happens at the poles affects us all (, , currents, ) & what we do impacts the & (, , loss/exploitation, melting, depletion...)

    1 reply . 66 retweets 211 likes
  4. Apr 22

    🐺New publication🇦🇶 Delighted to see that my review of the book "The Return of the South Pole Sled Dogs: With Amundsen’s and Mawson’s Antarctic Expeditions" written by has just been published in

    2 replies . 4 retweets 20 likes
  5. Apr 16

    Emperor Penguin Chick ‘Happy Feet’ pencil 8b on paper Walk the walk…

    5 replies . 12 retweets 39 likes
  6. 10 hours ago

    The extent on Apr 22nd 2022 was 6.42 million sq km. This is 0.99 million sq km below the 1981-2010 average and the 4th lowest extent ever recorded on this day of the year. This is 7.6% above the record low set in 2017 (5.97 million sq km)

  7. Apr 19

    We are not just losing ice - we are losing our future sea ice hits lowest recorded level with less than 2 million square kilometres of ice surrounding the continent in February second such event in 5 years – in 2017 record minimum also recorded

    3 replies . 40 retweets 57 likes
  8. 14 hours ago

    Drones to form part of $800m bid to shore up claim ⁦⁩

    1 retweet 3 likes
  9. Apr 20

    What if Antarctica, Earth's southernmost and coldest continent, had countries and a full civil population of human settlements? . But this one has 13 states from Sintopia's potential upcoming cartoon.

    1 like
  10. Apr 22

    Today is - it is our responsibility to care for this wondrous world & to ensure generations to come can live simultaneously along with many species - including - research is vital to understanding how we can

    1 retweet 6 likes
  11. 14 hours ago

    Ice Weekly Extent Changes 16-22 April 1st 1998 +1,046,000 Km² 🇲🇷 13th *𝟮𝟬𝟮𝟮* +861,000 🇳🇦 1979-2022 +754,557 🇿🇲 44th 2018 +473,000 🇵🇾 The 5th largest regrowth week sees Winter *𝟮𝟬𝟮𝟮* continue to push strongly Courtesy of NSIDC Raw Data

    1 like
  12. Apr 19

    'Many mysteries' but it doesn't look good.

    1 reply . 9 retweets 9 likes
  13. Apr 22

    The Ellen Fund joined an expedition with . Check out the & our Executive Director sharing her experience. Thanks to @RSOFoundation for sponsoring! 🎥: Oli Wheeldon

    1 reply . 4 retweets 15 likes
  14. Apr 21

    Snow Petrel on an iceberg, taken on the Peninsula

    6 likes
  15. Apr 20

    An shrimp with disco eyes (Notocrangon antarcticus)! They live on the seafloor in water temperatures as low as -2 °C

    1 reply . 7 retweets 44 likes
  16. Apr 19

    pink sky and pure soul it's quiet enjoy the peace

    3 likes
  17. Apr 20

    Is there any other penguins？

    2 likes
  18. 24 hours ago

    🎥 reflects on the alarming fact that she can see the ground at a time in the when it should be covered in snow… Learn more about at our website:

    1 retweet 1 like
  19. 10 hours ago

    dump & when they make landfall & are also causing , surface melt, sea- disintegration & large swells which are destabilizing ice shelves on .

  20. Apr 18

    Human adaptative behavior to conditions is marked by and a blend of type 1 and type 2 response.

    The inhibitory effect of light on melatonin production. (1) At daybreak, light falls on the retina and activates a photosensitive pigment called melanopsin, present in the photoreceptive ganglion cells of the retina, which projects through the retinohypothalamic pathway to the hypothalamus in the suprachiasmatic nucleus (SCN), releasing glutamate (GLU) and pleiotropic neuropeptide (PACAP) neutrotransmitters. (2) The SCN then releases the neurotransmitter GABA in the hyphothalamic paraventricular nucleus (PVN), through efferent pathways. (3 and 4) Consequently, the release of norepinephrine by postganglionic fibers is inhibited. (5) Interruption of norepinephrine stimulation in the pineal gland ceases the transcription of enzymes necessary for melatonin production. AANAT, aralkylamine N-acetyltransferase; cAMP, cyclic adenosine monophosphate; CREB, c-AMP response element-binding protein; HI-OMT, hydroxyindole-O-methyltransferase; NE, norepinephrine; PKA, protein kinase A
    Cold-sensitive neurons of the hypothalamic preoptic area (POA) receive peripheral signals from skin thermoreceptors and send stimuli to other regions of the hypothalamus that command the autonomic nervous system, promoting the release of norepinephrine and activating the adrenergic mechanism of heat containment and heat production. Norepinephrine stimulates hypophysiotropic PVN neurons to release TRH (thyrotropin-releasing hormone), increasing T4 release from the thyroid. In tissues, T4 is activated to T3 by type 2 deiodinase, enhancing the thermogenic program. Expression of cold-induced TRH is independent of serum thyroid hormone levels or nutritional status but can be disrupted by cortisol in chronic stress
    Human metabolism of thyroid hormones. The presence of iodine at positions 3 and 5 of the aromatic ring is essential for hormonal activity
    1 retweet 5 likes

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