Sensitivity of the Weddell Sea sector ice streams to sub-shelf melting and surface accumulation

first_imgA recent ocean modelling study indicates that possible changes in circulation may bring warm deep-ocean water into direct contact with the grounding lines of the Filchner–Ronne ice streams, suggesting the potential for future ice losses from this sector equivalent to ~0.3 m of sea-level rise. Significant advancements have been made in our knowledge of both the basal topography and ice velocity in the Weddell Sea sector, and the ability to accurately model marine ice sheet dynamics, thus enabling an assessment to be made of the relative sensitivities of the diverse collection of ice streams feeding the Filchner–Ronne Ice Shelf. Here we use the BISICLES ice sheet model, which employs adaptive-mesh refinement to resolve grounding line dynamics, to carry out such an assessment. The impact of realistic perturbations to the surface and sub-shelf mass balance forcing fields from our 2000-year “reference” model run indicate that both the Institute and Möller ice streams are highly sensitive to changes in basal melting either near to their respective grounding lines, or in the region of the ice rises within the Filchner–Ronne Ice Shelf. These same perturbations have little impact, however, on the Rutford, Carlson or Foundation ice streams, while the Evans Ice Stream is found to enter a phase of unstable retreat only after melt at its grounding line has increased by 50% of likely present-day values.last_img read more

Hyderabad FC have confirmed the signing of Spanish midfielder Lluis Sastre

first_imgHyderabad, Sep 8: Hyderabad FC have confirmed the signing of Spanish midfielder Lluis Sastre as they continue to strengthen their squad ahead of the upcoming Indian Super League. The 34-year-old former La Liga medio joins from Cypriot side AEK Larnaca and has penned a one-year deal till the end of the 2020-21 season. “I am very happy and excited to be able to play for Hyderabad FC in this season of the ISL. I have heard a lot of good things and I am already looking forward to starting training and meeting my teammates and the coach and working towards our goals,” said Sastre. IANSlast_img read more

On-song Donaghy leads Kerry to All-Ireland glory

first_imgThey’ve beaten Donegal on a scoreline of 2-9 to 0-12 at Croke Park. Kieran Donaghy and Paul Geaney each kicked 1-2 as the Kingdom won their 37th All Ireland title and their first since 2009.In the curtain-raiser, Kerry won a first All Ireland Minor football title in 20 years.  They beat Donegal on a scoreline of 0-17 to 1-10 in the curtain-raiser at Croke Park.last_img