Long-term Variations of Venus’s 365 nm Albedo Observed by Venus Express, Akatsuki, MESSENGER, and the Hubble Space Telescope

  title={Long-term Variations of Venus’s 365 nm Albedo Observed by Venus Express, Akatsuki, MESSENGER, and the Hubble Space Telescope},
  author={Yeon Joo Lee and Kandis Lea Jessup and Santiago P{\'e}rez-Hoyos and D. V. Titov and S{\'e}bastien Lebonnois and Javier Peralta and Takeshi Horinouchi and Takeshi Imamura and Sanjay S. Limaye and Emmanuel Marcq and Masahiro Takagi and Atsushi Yamazaki and Manabu Yamada and Shigeto Watanabe and Shin‐ya Murakami and Kazunori Ogohara and William Mcclintock and Gregory M. Holsclaw and Anthony Roman},
  journal={The Astronomical Journal},
An unknown absorber near the cloud-top level of Venus generates a broad absorption feature from the ultraviolet (UV) to visible, peaking around 360 nm, and therefore plays a critical role in the solar energy absorption. We present a quantitative study of the variability of the cloud albedo at 365 nm and its impact on Venus’s solar heating rates based on an analysis of Venus Express and Akatsuki UV images and Hubble Space Telescope and MESSENGER UV spectral data; in this analysis, the… 

Reflectivity of Venus’s Dayside Disk During the 2020 Observation Campaign: Outcomes and Future Perspectives

We performed a unique Venus observation campaign to measure the disk brightness of Venus over a broad range of wavelengths in 2020 August and September. The primary goal of the campaign was to

Winds From the Visible (513 nm) Images Obtained by the Venus Monitoring Camera Onboard Venus Express

We present more than 250,000 wind vectors derived from the visible (513 nm) images captured by the Venus Monitoring Camera (VMC) onboard ESA's Venus Express orbiter in the Southern hemisphere from 01

Investigation of UV Absorbers on Venus Using the 283 and 365 nm Phase Curves Obtained From Akatsuki

The so‐called unknown absorber in the clouds of Venus is an important absorber of solar energy, but its vertical distribution remains poorly quantified. We analyze the 283 and 365 nm phase curves of

Potential for Phototrophy in Venus' Clouds.

Venus' signature phototrophic windows and subwindows overlap with the absorption profiles of several photosynthetic pigments, especially bacteriochlorophyll b from intact cells and phycocyanin, and Venus' light, with limited UV flux in the middle and lower clouds, is likely quite favorable for phototrophy.

Global Structure of Thermal Tides in the Upper Cloud Layer of Venus Revealed by LIR on Board Akatsuki

Longwave Infrared Camera (LIR) on board Akatsuki first revealed the global structure of the thermal tides in the upper cloud layer of Venus. The data were acquired over three Venusian years, and the

Venus Cloud Winds and Mean Albedo Variability From Atmospheric Waves

  • R. Hueso
  • Environmental Science, Physics
    Journal of Geophysical Research: Planets
  • 2019
Venus's atmosphere presents an enigmatic global circulation with winds that rotate around the planet 60 times faster than the slow rotation of the surface. For decades the connection between the

A Sensitivity Study of the Thermal Tides in the Venusian Atmosphere: Structures and Dynamical Effects on the Superrotation

In order to resolve discrepancy between recent observational and numerical studies on the thermal tides in the Venusian atmosphere, we investigated by means of a general circulation model how the



Mean winds at the cloud top of Venus obtained from two-wavelength UV imaging by Akatsuki

Venus is covered with thick clouds. Ultraviolet (UV) images at 0.3–0.4 microns show detailed cloud features at the cloud-top level at about 70 km, which are created by an unknown UV-absorbing

Polarization studies of the Venus UV contrasts - Cloud height and haze variability

Morphology of the cloud tops as observed by the Venus Express Monitoring Camera

Coordinated Hubble Space Telescope and Venus Express Observations of Venus’ upper cloud deck