Focus

Cities

Research into city living and its impacts is burgeoning, thanks to the fact that more than half of us now live in urban areas. In this web focus we compile a number of papers documenting some of the challenges associated with city life, and some of the less expected outcomes.

Top

Editorial

Urban lead p729

doi:10.1038/ngeo1322

The world is undergoing a phenomenally fast wave of urban growth. Research that can help tackle some of the ensuing problems is likely to originate in cities themselves.


Top

Correspondence

City lights and urban air pp730 - 731

H. Stark, S. S. Brown, K. W. Wong, J. Stutz, C. D. Elvidge, I. B. Pollack, T. B. Ryerson, W. P. Dube, N. L. Wagner & D. D. Parrish

doi:10.1038/ngeo1300

City lights can alter the concentration of nitrate radicals in the atmosphere. These alterations have potential - albeit small - consequences for pollution levels the following day.


Top

Books and Arts

The age of the megacity pp733

Luís M. A. Bettencourt

doi:10.1038/ngeo1299

The book is a reminder that cities grow primarily as the result of the social and economic aspirations of common people. This diverse and often messy social city underpins everything else.

Top

News and Views

Roofs and roads pp736

Anna Armstrong

doi:10.1038/ngeo1311

As urban areas continue to be developed at breakneck speed, careful thought regarding their construction could help to alleviate some of the climatic toll, at least on a local level.


Top

From the archives

Top

Editorial

Adjustable adaptation

doi:10.1038/ngeo576

Humans have been responding to fluctuating sea levels for millennia. Adapting to future change will require a swift start on developing innovative infrastructure while keeping the option to adjust in the long term.

Top

Correspondence

Focus on known active faults

John McCloskey

doi:10.1038/ngeo1221

Top

Commentary

Sustaining coastal urban ecosystems

Torbjörn E. Törnqvist & Douglas J. Meffert

doi:10.1038/ngeo365

The 2008 Atlantic hurricane season once again highlighted the challenges awaiting low-lying population centres close to the ocean. In the face of global sea-level rise, unconventional thinking is required to make urban coasts more resilient.

Top

News & Views

Urban waste

Anna Armstrong

doi:10.1038/ngeo680

Brief relief

Anna Armstrong

doi:10.1038/ngeo542

Pollution meets sea salt

Roland von Glasow

doi:10.1038/ngeo192

In densely populated coastal areas, reactions of polluted air with sea salt aerosol from the ocean can lead to high surface ozone levels that affect air quality.

Top

Progress Article

Sinking deltas due to human activities

James P. M. Syvitski, Albert J. Kettner, Irina Overeem, Eric W. H. Hutton, Mark T. Hannon, G. Robert Brakenridge, John Day, Charles Vörösmarty, Yoshiki Saito, Liviu Giosan & Robert J. Nicholls

doi:10.1038/ngeo629

Many of the world's deltas are densely populated and intensively farmed. An assessment of recent publications indicates that the majority of these deltas have been subject to intense flooding over the past decade, and that this threat will grow as global sea-level rises and as the deltas subside.

Top

Letters

Consistent geographical patterns of changes in high-impact European heatwaves

E. M. Fischer & C. Schär

doi:10.1038/ngeo866

Climate-change projections suggest that European summer heatwaves will become more frequent and severe during this century. An analysis of a set of high-resolution regional climate simulations reveals consistent geographical patterns in these changes, with the most severe health impacts in southern European river basins and along the Mediterranean coasts.

Deforestation driven by urban population growth and agricultural trade in the twenty-first century

Ruth S. DeFries, Thomas Rudel, Maria Uriarte & Matthew Hansen

doi:10.1038/ngeo756

Reducing tropical deforestation is at present considered a cost-effective option for mitigating climate change. Satellite-based estimates of forest loss suggest that urban population growth and urban and international demand for agricultural products are key drivers of deforestation in the tropics.

Model projections of rapid sea-level rise on the northeast coast of the United States

Jianjun Yin, Michael E. Schlesinger & Ronald J. Stouffer

doi:10.1038/ngeo462

Human-induced climate change is expected to cause sea-level rise globally as well as regionally. An analysis of state-of-the-art climate models indicates that the northeastern US coast is particularly likely to experience substantial rises in regional sea level as a result of the projected slowdown of the Atlantic meridional overturning circulation.

Top

Backstory

Olympic atmosphere

doi:10.1038/ngeo930

Veerabhadran Ramanathan, James Schauer, Hung Nguyen and colleagues found the Beijing Olympics to be conducive to international collaboration in science, as well as sport, as they attempted to assess the effect of emission restrictions on climate forcing.


Extra navigation

naturejobs

ADVERTISEMENT