今週号

Volume 546 Number 7660 pp575-696

29 June 2017

表紙について

Droplets form in atmospheric clouds through heterogeneous nucleation on aerosol particles that act as cloud condensation nuclei. Spontaneous activation of these nuclei depends on the interplay between two factors: the Raoult effect and the Kelvin effect. In the Raoult effect, activation potential increases as solute concentration rises or as water activation decreases. In the Kelvin effect, activation potential decreases as droplet size shrinks, and increases as surface tension is lowered. It is generally thought that any lowering of particle surface tension induced by organic molecules would be cancelled out by a simultaneous reduction in the Raoult effect with little overall effect on cloud-droplet activation. However, in this issue, Colin O’Dowd and his colleagues show that in the atmosphere, surfactant molecules can lower surface tension in such a way that its effect on water uptake prevails over any changes in the Raoult effect, leading to a large increase in the concentration of cloud droplets. The authors suggest that this should have implications for the representation of cloud formation processes in climate models. Cover image: michaeldunlap.net

This Week

Editorials

Top

World View

Top

Research Highlights

Top

Seven Days

Top

News in Focus

Feature

Top

comment

Books and Arts

Top
  • Astrobiology: Hunting aliens

    Ramin Skibba enjoys a profile of the woman heading the search for life off Earth.

    • Review of Making Contact: Jill Tarter and the Search for Extraterrestrial Intelligence
      Sarah Scoles
  • Books in brief

    Barbara Kiser reviews five of the week's best science picks.

  • Medicine: Heroes of global health

    Amy Maxmen assesses a documentary on medical pioneer Paul Farmer and colleagues round the world.

    • Review of Bending the Arc
      Kief Davidson & Pedro Kos

Careers

Features

Top

Q&As

Top

News

Top

naturejobs job listings and advertising features

Futures

Specials

Technology Feature

Top
  • The architecture of structured DNA

    Researchers are exploiting the structural properties of DNA to build nanoscale models for use in medicine and materials science.

    • XiaoZhi Lim

research

Brief Communications Arising

Top

Articles

Top
  • 神経科学 : 恒常性回路は島皮質の食物手掛かり応答を選択的に制御する

    • Yoav Livneh
    • Rohan N. Ramesh
    • Christian R. Burgess
    • Kirsten M. Levandowski
    • Joseph C. Madara
    • Henning Fenselau
    • Glenn J. Goldey
    • Veronica E. Diaz
    • Nick Jikomes
    • Jon M. Resch
    • Bradford B. Lowell
    • Mark L. Andermann

    A combination of microprism-based cellular imaging to monitor insular cortex visual cue responses in behaving mice across hunger states with circuit mapping and manipulations reveals a neural basis for state-specific biased processing of motivationally relevant cues.

Letters

Top

Corrigenda

Top