Daily Bulletin


The Conversation

  • Written by Daily Bulletin
imageComing to a forest near you?Alpha/Flickr, CC BY-SA

Walking on cornflakes. That’s what it sounds like to hike through a rainforest in the grip of a strong drought. Each step crackles with dry snapping twigs and leaves. It’s frustrating for field biologists like us – we can forget about glimpsing anything but the most oblivious of wildlife.

Rainforests aren’t supposed to be bone-dry like this, and normally they’re not. But at our Daintree Drought Experiment in far north Queensland, we and our colleagues have suspended more than 3,000 plastic panels above the forest floor to create an artificial mega-drought. The experiment began only three months ago but already the rainforest beneath is wilted and hurting.

imageTinder-dry understorey at the Daintree Drought Experiment.Yoav Daniel Bar-Ness

The Daintree drought is just a taste of what could be coming soon – not just to our experimental study site but to large swathes of Australia and beyond. Climatologists are telling us to buckle our seatbelts because the ride could get scary. Get ready, they’re saying, for an event some are calling “Godzilla”.

Not your average drought

Naming a drought after a giant fire-breathing reptile may not be very scientific, but it does grab one’s attention. The most powerful driver of annual rainfall variation globally is the El Niño-Southern Oscillation, in which warm surface waters slosh back and forth across the Pacific Ocean, creating flooding rains in certain places and times and droughts in others. This isn’t the only cause of rainfall variability around the world, but it’s one of the biggest in terms of its sheer scale and impact.

Climate researchers say this year’s El Niño could be stronger than anything in living memory — stronger even than the event that pummelled large expanses of the New World and Western Pacific region in 1997-98. In that year, a single massive fire consumed over three million hectares of drought-choked rainforest, farmlands and indigenous territories in Brazilian Amazonia. Dense smoke caused more people to go to hospital for respiratory distress, and airports had to be closed repeatedly.

imageAftermath of the devastating 1998 mega-fire in Amazonia.William Laurance

Soon afterwards, fires spurred by the same mega-drought rampaged across Indonesia and New Guinea. Huge expanses of Borneo burned.

In Australia, the El Niño led to widespread coral bleaching and increased stresses for forests, farms and cities already struggling with years of below-average rainfall. This El Niño interacted with other sources of weather variation, such as sea-surface temperatures in the Southern and Indian Oceans, to create the so-called Millennium Drought.

Be afraid

At the risk of sounding like a doomsayer, it’s impossible to ignore the possibility that we could be facing even worse conditions in the near future. Over 80% of Queensland has already experienced a severe rainfall deficit over the last three years. And leading climatic models suggest the severity of extreme El Niño events and heatwaves will rise with global warming. Worldwide, seven of the ten hottest years on record occurred during or immediately after an El Niño year.

imageLarge expanses of eastern Australia are already beset by strong rainfall deficits.Australian Bureau of Meteorology

In addition, rapidly expanding land-use changes are making ecosystems far more vulnerable to droughts and fire. For instance, forests that have been logged or fragmented are drier and have much heavier loads of flammable slash than do pristine forests.

Finally, as new roads proliferate almost everywhere, so do the number of human-caused ignition sources. Ecosystems where fire was once foreign — such as the world’s deep rainforests — now burn with increasing regularity. For such environments and their wildlife and carbon stores, the effects can be devastating.

imageA logging operation in Indonesian Borneo.William Laurance

Time to start planning

If we don’t want to risk such catastrophes, we need to get smarter. Be they natural or human-caused, droughts are going to keep happening. We can’t stop them but we can at least get ready.

A big priority is to invest in fire control and prevention. Recent efforts in Brazil show that wildfires can be substantially reduced by proactive fire bans and improving rural fire-fighting capabilities. These are areas where Australia could greatly aid its northern neighbours — despite the near-sighted views of the Abbott government, which is proposing to slash overseas aid across the Pacific region.

We also need to get wise about rural development. From New Guinea to Siberia, there are serious hidden costs to development schemes that open up pristine landscapes to human incursions. Yes, we need economic growth, but we can’t tally up the benefits of reaping and razing the Earth without also taking into account its many financial, social and environmental impacts.

Beyond this, we need to plan better for a climatically risky future. Nations such as India, for example – whose agriculture is intensely vulnerable to drought – are hugely exposed to such dangers. Long-term drying conditions and increasingly intense wildfires are virtually reshaping lands in the American West. And across much of the world, burgeoning cities are also at risk – and are already guzzling down torrents of water vitally needed for farming and nature.

Intense fires are reshaping the land and public attitudes in the American West.

Ultimately, it doesn’t make a lot of sense to do in-depth research on droughts on the one hand, and to ignore its far-reaching implications on the other. It’s time to get ready for the next big drought – and the one after that. Better to prepare in advance than to risk battling a fire-breathing monster.

Susan Laurance is a Tropical Leader at James Cook University and former president of the Association for Tropical Biology and Conservation. She receives funding from the Australian Research Council. She is affiliated with ALERT—the Alliance of Leading Environmental Researchers and Thinkers.

Bill Laurance receives funding from the Australian Research Council and other scientific and philanthropic organisations. He is the director of the Centre for Tropical Environmental and Sustainability Science at James Cook University and founder and director of ALERT--the Alliance of Leading Environmental Researchers and Thinkers.

Authors: Daily Bulletin

Read more http://theconversation.com/godzilla-el-nino-time-to-prepare-for-mega-droughts-46673

Writers Wanted

Of all the places that have seen off a second coronavirus wave, only Vietnam and Hong Kong have done as well as Victorians

arrow_forward

Mould and damp health costs are about 3 times those of sugary drinks. We need a healthy housing agenda

arrow_forward

How To Spot On A Good Online Gaming Website

arrow_forward

The Conversation
INTERWEBS DIGITAL AGENCY

Politics

Prime Minister Interview with Kieran Gilbert, Sky News

KIERAN GILBERT: Kieran Gilbert here with you and the Prime Minister joins me. Prime Minister, thanks so much for your time.  PRIME MINISTER: G'day Kieran.  GILBERT: An assumption a vaccine is ...

Daily Bulletin - avatar Daily Bulletin

Did BLM Really Change the US Police Work?

The Black Lives Matter (BLM) movement has proven that the power of the state rests in the hands of the people it governs. Following the death of 46-year-old black American George Floyd in a case of ...

a Guest Writer - avatar a Guest Writer

Scott Morrison: the right man at the right time

Australia is not at war with another nation or ideology in August 2020 but the nation is in conflict. There are serious threats from China and there are many challenges flowing from the pandemic tha...

Greg Rogers - avatar Greg Rogers

Business News

Guide to Shipping Container Hire

If you are thinking of hiring a shipping container rather than purchasing one, there are many great reasons to do so. It is a more affordable option and when you are done using it for what you neede...

News Co - avatar News Co

Top 5 US Logistics Companies

Nothing is more annoying than having to deal with unreliable shipping companies for your fragile and important packages. Other than providing the best customer service, a logistics company also ne...

News Co - avatar News Co

Luke Lazarus Helps Turns Startups into Global Stalwarts

There are many positive aspects to globalization. It is no secret that those who have been impacted by globalization tend to enjoy a higher standard of living in general. One factor that has led to ...

Emma Davidson - avatar Emma Davidson



News Co Media Group

Content & Technology Connecting Global Audiences

More Information - Less Opinion