Icebergs, sea ice, blue carbon and Antarctic climate feedbacks

first_imgSea ice, including icebergs, has a complex relationship with the carbon held within animals (blue carbon) in the polar regions. Sea-ice losses around West Antarctica’s continental shelf generate longer phytoplankton blooms but also make it a hotspot for coastal iceberg disturbance. This matters because in polar regions ice scour limits blue carbon storage ecosystem services, which work as a powerful negative feedback on climate change (less sea ice increases phytoplankton blooms, benthic growth, seabed carbon and sequestration). This resets benthic biota succession (maintaining regional biodiversity) and also fertilizes the ocean with nutrients, generating phytoplankton blooms, which cascade carbon capture into seabed storage and burial by benthos. Small icebergs scour coastal shallows, whereas giant icebergs ground deeper, offshore. Significant benthic communities establish where ice shelves have disintegrated (giant icebergs calving), and rapidly grow to accumulate blue carbon storage. When 5000 km2 giant icebergs calve, we estimate that they generate approximately 106 tonnes of immobilized zoobenthic carbon per year (t C yr−1). However, their collisions with the seabed crush and recycle vast benthic communities, costing an estimated 4 × 104 t C yr−1. We calculate that giant iceberg formation (ice shelf disintegration) has a net potential of approximately 106 t C yr−1 sequestration benefits as well as more widely known negative impacts.last_img read more

Confidence in the potential of Queensland’s property market is on the rise

first_imgConfidence has lifted in the Queensland property market this quarter.CONFIDENCE in Australia’s property market lifted in only one state this quarter – Queensland.New analysis released through the ANZ/Property Council industry sentiment survey found that confidence levels had lifted in Queensland for the third consecutive quarter.More from newsMould, age, not enough to stop 17 bidders fighting for this home3 hours agoBuyers ‘crazy’ not to take govt freebies, says 28-yr-old investor3 hours agoWhile it was the only state to experience a lift in the most recent quarter it was still behind other states on a whole.Property Council Queensland executive director, Chris Mountford, said while it was a good sign the sector was improving more needed to be done to achieve the high levels of confidence some of the southern states were experiencing.“The difference between the local property industry being pleasantly optimistic and firing on all cylinders is potentially thousands of Queensland jobs,” Mr Mountford said.He said the most recent rise in confidence could be attributed to commitments to infrastructure and things such as the extension of the boost to the First Home Owners Grant.Mr Mountford said the industry was waiting for the impending release of the SEQ Regional Plan, to see what sort of impact that would have on the industry.Video Player is loading.Play VideoPlayNext playlist itemMuteCurrent Time 0:00/Duration 0:47Loaded: 0%Stream Type LIVESeek to live, currently playing liveLIVERemaining Time -0:47 Playback Rate1xChaptersChaptersDescriptionsdescriptions off, selectedCaptionscaptions settings, opens captions settings dialogcaptions off, selectedQuality Levels720p720pHD540p540p360p360p270p270pAutoA, selectedAudio Trackdefault, selectedFullscreenThis is a modal window.Beginning of dialog window. Escape will cancel and close the window.TextColorWhiteBlackRedGreenBlueYellowMagentaCyanTransparencyOpaqueSemi-TransparentBackgroundColorBlackWhiteRedGreenBlueYellowMagentaCyanTransparencyOpaqueSemi-TransparentTransparentWindowColorBlackWhiteRedGreenBlueYellowMagentaCyanTransparencyTransparentSemi-TransparentOpaqueFont Size50%75%100%125%150%175%200%300%400%Text Edge StyleNoneRaisedDepressedUniformDropshadowFont FamilyProportional Sans-SerifMonospace Sans-SerifProportional SerifMonospace SerifCasualScriptSmall CapsReset restore all settings to the default valuesDoneClose Modal DialogEnd of dialog window.This is a modal window. This modal can be closed by pressing the Escape key or activating the close button.Close Modal DialogThis is a modal window. This modal can be closed by pressing the Escape key or activating the close button.PlayMuteCurrent Time 0:00/Duration 0:00Loaded: 0%Stream Type LIVESeek to live, currently playing liveLIVERemaining Time -0:00 Playback Rate1xFullscreenMonthly Core Index: June00:47last_img read more