With a larger sample, planets at varying stages
of atmospheric loss will be found that confirm whether or not the majority of close in rocky planets are the burnt embers leftover of gas giants who ventured to close to their host stars.
Since among the main goals of this mission are the characterization
of atmospheric loss processes (with special attention to water) and the identification of their relation to the solar wind (Bougher et al. 2014), major scientific return related to space weather is expected in the next years.
The reappearance of these ions, which retain characteristics of the pristine solar wind, provides a new way to track the properties of the solar wind and may make it easier to link drivers
of atmospheric loss directly to activity in the upper atmosphere and ionosphere.
New measurements
of atmospheric loss by NASA's MAVEN probe should help scientists determine how a planet with rushing water and a temperate climate a few billion years ago transformed into a cold, dry desert.
Because more charged particles would be created, there also would be more sputtering, another form
of atmospheric loss.
«Our analysis suggests that such space weather events may prove to be a key driver
of atmospheric losses for exoplanets orbiting an active young Sun - like star,» the authors write.
Not exact matches
Blues will make the trip to West London this evening to face up against sour opposition: Brentford, in what will be a cagey affair as Blues will try to get the last laugh to silence the poor Bees lot that are still recovering from the
loss of those that left Griffin Park to join a much more
atmospheric ground...
MAVEN carries a suite
of instruments that have been measuring Mars»
atmospheric loss since November 2014.
«People have thought about how forest
loss matters for an ecosystem, and maybe for local temperatures, but they haven't thought about how that interacts with the global climate,» said co-author Abigail Swann, a UW assistant professor
of atmospheric sciences and
of biology.
«Although a direct causal link has not been established between the
atmospheric phenomena observed in late October 2012 and the record - breaking sea - ice
loss observed during the preceding summer months, all
of the observations are consistent with such an interpretation,» states the Oceanography article.
Colder temperatures and weaker high - altitude winds may make the arctic polar vortex even more intense in future winters and trigger greater ozone
loss, says
atmospheric scientist Paul Newman
of NASA's Goddard Space Flight Center in Greenbelt, Maryland, although the
losses probably won't approach those in Antarctica.
An increasing body
of research reveals that these weather events can be linked to
loss of sea ice in the Arctic, said Charles Greene, professor
of earth and
atmospheric sciences at Cornell University, who contributed to the article.
To determine whether declining pollutants deserve credit for the recovery, the researchers used a 3D
atmospheric model to separate the effects
of the chemicals from those
of weather, which can affect ozone
loss through winds and temperature, and volcanic eruptions, which deplete ozone by pumping sulfate particles into the upper atmosphere.
Instead it reveals bumps that could indicate a
loss of OH, according to research presented at the AGU conference by Alexander Turner, a graduate student in
atmospheric chemistry at Harvard University.
«But the stellar wind can significantly contribute to the long - term erosion and
atmospheric loss of many exoplanets, so the climate models tell only part
of the story.»
Future missions like the James Webb Space Telescope, which NASA will launch in 2019 to peer into the early history
of the universe, will therefore «be essential for getting more information on stellar winds and exoplanet atmospheres,» the authors say, «thereby paving the way for more accurate estimations
of stellar - wind induced
atmospheric losses.»
The 1989 Montreal Protocol led to the phaseout
of those chemicals, but their long
atmospheric lifetime means that seasonal ozone
losses will persist well into this century.
The findings are relevant to modern - day
atmospheric models and to an understanding
of what a
loss of sea ice means to both sea and land temperatures.
The researchers find that «ocean - driven melt is an important driver
of Antarctic ice shelf retreat where warm water is in contact with shelves, but in high greenhouse - gas emissions scenarios,
atmospheric warming soon overtakes the ocean as the dominant driver
of Antarctic ice
loss.»
The researchers warn, however, that the future evolution
of the AMO remains uncertain, with many factors potentially affecting how it interacts with
atmospheric circulation patterns, such as Arctic sea ice
loss, changes in solar radiation, volcanic eruptions and concentrations
of greenhouse gases in the atmosphere.
«Once you have that combination
of ocean heat and
atmospheric heat — which are related — that's when the ice sheet could really experience dramatic ice mass
loss.»
«We are beginning to see the links in a chain that begins with solar - driven processes acting on gas in the upper atmosphere and leads to
atmospheric loss,» said Bruce Jakosky, MAVEN principal investigator with the Laboratory for
Atmospheric and Space Physics at the University
of Colorado, Boulder.
the Arctic has shown a pattern
of strong low - level
atmospheric warming over the Arctic Ocean in autumn because
of heat
loss from the ocean back to the atmosphere....
«Even a weak electric wind could still play a role in water and
atmospheric loss at any planet,» said Dr Alex Glocer
of NASA Goddard, a co-author on the paper.
«Even a weak electric wind could still play a role in water and
atmospheric loss at any planet,» said Alex Glocer
of NASA Goddard, a co-author on the paper.
The role
of ocean — atmosphere coupling in the zonal - mean
atmospheric response to Arctic sea ice
loss.
Osborne, J. M., Screen, J. A. & Collins, M. Ocean —
atmospheric state dependence
of the
atmospheric response to Arctic sea ice
loss.
Screen, J. A., Deser, C., Simmonds, I. & Tomas, R.
Atmospheric impacts
of Arctic sea ice
loss, 1979 — 2009: separating forced change from
atmospheric internal variability.
Respective roles
of direct GHG radiative forcing and induced Arctic sea ice
loss on the Northern Hemisphere
atmospheric circulation.
The impact
of regional Arctic sea ice
loss on
atmospheric circulation and the NAO.
The
atmospheric circulation response seems to be sensitive to the magnitude and geographic pattern
of sea - ice
loss and, in some cases, to the background climate state.
«I predict that due to the
loss of these
atmospheric whirlpools, the average temperature on Jupiter will change by as much as 10 degrees Celsius, getting warmer near the equator and cooler at the poles,» says Marcus.
The objective
of the MAVEN mission EPO program is to engage multiple audiences in the quest to understand Mars» long - term
atmospheric losses, giving insight into the history
of Mars» atmosphere and climate, liquid water, and planetary habitability.
The objective
of the MAVEN mission E / PO program is to engage multiple audiences in the quest to understand Mars» long - term
atmospheric losses, giving insight into the history
of Mars» atmosphere and climate, liquid water, and planetary habitability.
NGIMS can provide a basis for models
of present and past
atmospheric loss.
Cornerstone Evaluation Associates LLC is the external research firm charged with carrying out the evaluation activities necessary to determine the effectiveness and impact
of MAVEN's Education and Public Outreach (E / PO) effort and its success in achieving its overall goal to «engage multiple audiences in the quest to understand Mars» long - term
atmospheric losses, giving insight into the history
of Mars» atmosphere and climate, liquid water, and planetary habitability.»
The goal
of the mission is to determine the role that
loss of atmospheric gas to space played in changing the Martian climate through time.
Scientists are still investigating how this
atmospheric loss occurred, but suggest that the sun might have pushed light molecules out
of Mars» upper atmosphere that could not be held in by the planet's gravity.
«Many studies, albeit not all, have found that most
of the responses to sea ice
losses are confined to polar latitudes and lower
atmospheric levels.
«Controlling black carbon may be the only way
of preventing the
loss of the Arctic completely,» said Mark Jacobson, an
atmospheric scientist who researches air pollution and climate change at Stanford University.
But from an email conversation with Francis, Vavrus, and several other
atmospheric scientists this week, it became clear that there may be more questions than answers at this point, given the large amount
of natural variability that affects winter weather patterns, and the very short observational record
of how the atmosphere responded to extreme
losses of sea ice (only five winters
of records since 2007).
Since most
of the atmosphere was lost as part
of a dramatic climate change, MAVEN will make definitive scientific measurement
of present - day
atmospheric loss that will offer insight into the Red Planet's history.
The Sahara off - road experience was kept to a basic dirt trail on the approach to a hilltop site where Jeep had some Rubicons prepared for us to hop into (the turbo - four is excellent for crawling, offering the sort
of predictable and smooth power delivery needed to keep everything shiny without worries about
atmospheric loss at altitude).
Was it an
atmospheric tale
of love and
loss?
After the moody,
atmospheric Majora's Mask, a game primarily about facing death and
loss, the cutesy, cartoonish art style for Wind Waker left a large part
of the Zelda community feeling that Nintendo was taking the franchise in the wrong direction.
The choice
of works is very deliberate with the exhibition broken down into seven themes: Beauty, Power and Space, which looks at each artist's engagement with the sublime, a theme central to English Romantic art but which survived through the modernist movement and is a key feature
of Twombly's paintings; Atmosphere, which considers the ways in which the three artists paint land and sea through a filter
of atmospheric conditions; Naught so Sweet as Melancholy, named after a phrase in Robert Burton's Anatomy
of Melancholy, where the theme
of loss and memorialisation are central concerns; The Seasons which reflects upon the passage
of time; Fire and Water where all three artists evince the power
of the elements; The Vital Force which brings together works
of a sensual or erotic nature; and finally A Floating World where each artist contemplates mortality and external events that impact on their lives.
In this case
atmospheric warming will soon become the dominant driver
of ice
loss, but prolonged ocean warming will delay its recovery for thousands
of years.»
The lag between decreases in sea ice extent during late summer and changes in the mid-latitude
atmospheric circulation during other seasons (when the recent
loss of sea ice is much smaller) needs to be reconciled with theory.
Much
of the recent sea ice
loss is attributed to warmer sea surface temperatures with southerly wind anomalies a contributing cause [Francis and Hunter, 2007; Sorteberg and Kvingedal, 2006], with thermodynamic coupling leading to associated increases in
atmospheric moisture.»
Most past modeling experiments that investigated the
atmospheric response to Arctic change only considered the
loss of sea ice, which
of course misses much
of the effect
of Arctic amplification.