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28.09.2014
There are many causes of sudden hair loss, and discovering the hair loss causes often holds the key to how to stop hair loss. And many hair loss causes--that you might not have considered-- are, indeed, a form of stress hair loss.However, not all hair loss is stress related hair loss. There are a number of causes of sudden hair loss, and knowing the reason for your sudden hair loss can help you reverse it--if that is possible:Hormones - This is a common cause of female hair loss. Intestinal parasites also called worms thrive in the cat’s intestine and bring about weight loss. Feline Infectious Peritonitis is caused by a virus and is often diagnosed in cats bred in catteries. So, if you observe sudden, rapid weight loss in your cat, you should contact your vet immediately. 10 Reasons Why Fish Can Be Your Good Pets In addition to popular pets like dog and cat, thereAre You Ready to Adopt a Rabbit? In this post I reveal what I think is an original synthesis that gives the full picture of some of the main causes and effects of Northern Hemisphere Sudden Stratospheric Warming events based on my readings of many other papers along with hours of my own original research. Lastly, I'd like to thank Neven for allowing me to do this guest post on his amazing Arctic Sea Ice blog. Since their discovery by Richard Scherhag in 1951, Sudden Stratospheric Warming events(SSW's) have drawn considerable attention and research interest due to their sometimes extreme effects on Northern Hemisphere winter weather. These early theories were logical based on the limited data available and also based on the amazing essential core discovery related to SSW's-- the upper and middle stratosphere over extreme high latitudes, at elevations ranging from about 25 to 45 km would warm rapidly, in the period of just a few days. So as the chart shows us, during the January 2013 SSW, just as air was falling and warming in the North Pole stratosphere, air was rising and cooling over the equator in the stratosphere-- a teleconnected effect covering some 9,000 km! 4) They cause some level of wind pattern disturbance over the pole, with the larger ones displacing, disrupting, or outright destroying the polar vortex. If all SSW's did, was affect the upper or middle stratosphere over the pole or even the equator (as shown in the chart above), they would remain an interesting atmospheric curiosity or mystery much as Scherhag found them in 1951. During a large SSW, the breakdown of the polar vortex reverses the normal westerlies in high latitudes (westerlies partially driven by the counter clockwise flow of wind around the polar vortex). Though certainly declines in Arctic sea ice may be changing the patterns of NH weather, the research on these effects is ongoing. The misery that SSW's can bring to lower latitudes due to their wind and pressure effects can be measured quite readily in the useful Arctic Oscillation Index (AO).
When a large SSW event occurs such as we had in 2013, warm and descending air over the pole compresses even more, warms even more, disrupts the vortex (as shown above) and turns the AO Index negative. The correlation between the three is remarkable and directly related to the initial event-- the SSW that began in early January when England's weather turned cold and a prevailing wind began to blow from the east as the vortex was shattered and the AO Index turned to the negative. There are a few clues that one can use to trace the origin of the descending warm air over the pole, but before looking at that, let's talk about that descending air in general. Thanks to satellite reanalysis data, we can in fact see exactly where the warm air came from before reaching the polar latitudes. Again, this bubble of warm air rises up to become a thermal wave over South Central Asia on about December 21, 2012 and seems to nearly explode to the north and to the east. In considering the development of these thermal waves at mid-stratospheric levels over Asia, there are several factors that must be considered. The second consideration is the rapidity necessary to bring such a large mass of warm air upward into the stratosphere.
Again, It was this basic realization that led a few early researchers to consider volcanoes as a possible cause of SSW's. Obviously, in the formation of a thermal wave in the stratosphere over South Central Asia we would be looking for a region in the troposphere in the same proximate region with unusually high positive omega.
In looking at the omega reanalysis data for the period around the formation of the thermal wave that formed over Asia in December 2012, we find the following very interesting data that displays the average omega across the entire troposphere from 1000 hPa up to 100 hPa. Again, for a clearer understanding of omega, in looking at the preceding diagram, one can imagine a stream of air moving right out of the center of the red and orange area, outward from the screen or page. In comparing the two, we see that the high omega over this region in December 2012 truly is at least a monthly anomaly and not a year-round feature of this region. The area of high positive omega over South Central Asia in December 2012 is centered on the Kunlun Shan mountains and the southwestern part of the Altun Mountain range. Of course, it is not surprising at all to get a high omega for this area as the Kunlun Sham and Altun mountains rise rapidly from their close proximity to the Taklaman Desert and offer the potentially ideal combination of topographic features to produce strong topographically induced lift to air. Note that in the previous image we clearly see the area of high omega to be the southern side of Taklamakan Desert.
The north to south direction of these prevailing winter winds across the Taklamakan Desert would possibly be a key part of the energy that serves to launch the warmer desert air off the Kunlun Shan and Altun Mountains with the right overall conditions. We've identified the boundary between the Taklamakan Desert and the Kunlun Shan and Altun Mountains as the general region of high positive omega during the month of December 2012. When prevailing north to south winter winds blowing across the Taklamakan desert (and including possible energy from jet stream winds) are directed toward the Tibetan Plateau under the right conditions, the perfect topological lifting conditions occur, allowing the warmer air from the desert to ascend rapidly into the stratosphere where it builds into a thermal planetary wave of warmer air that is carried north by prevailing upper level winds.
Upon reaching the higher latitudes of the Arctic, the warmer air begins to descend rapidly, warming even more but also carrying enough momentum during the descent to drag mesospheric air down into the stratosphere as well. As illustrated earlier, the rapidly descending air in the stratosphere over the Arctic has effects or teleconnections that reach some 9,000 km away to the equator. I have only briefly mentioned the tropopause thus far, but it should of course not be left out in a discussion of the full dynamics of SSW's. We've talked about the unique topological circumstances with location of the Taklamakan desert next to the Tibetan Plateau. We must however add the additional factors of the lower winter tropospheric height and the fact that the Kunlun Shan and Altun Mountains are at an ideal position for penetrating the tropopause with warm air from below as the tropopause drops down rapidly between 30 and 40 degrees, as seen in this simple illustration (B.
Thus, not only does the tropopause lower in the winter, it also drops down dramatically just at the point where the Kunlun Shan and Altun Mountains ranges are located and ready to provide the necessary launch platform for warm air from the Taklamakan desert. It has been known for quite some time that Greenland ice cores contain a high level of isotopes that can be traced back specifically to the Taklamakan desert and associated Tarim basin.


Furthermore, it stands to reason that as this air forms the thermal wave that travels north toward the Arctic to descend as a SSW event, then some of that air would naturally make its way into the Greenland glacial ice. My investigation into numerous SSW events using reanalysis data has shown that in every event that I could find reliable data on, the initial locus of the warm air has come from South Central Asia.
Future research could focus on gathering mid-stratosphere air samples at 10 hPa during one of the thermal wave episodes, just prior to the SSW event.
Finally, a close analysis of the regions involved in high positive omega events should be conducted to see what meteorological conditions exist to create the wind field energy necessary for topographic lifting. Less SSW's would mean that the polar vortex stays intact and all the cold air stays in the Arctic helping the ice to thicken more.
In regards to what comes earlier in the chain related to winds and the desert accumulating heat, I think the desert in that area would naturally be a source of warm air, but it would be good to get some solid data on what the jet stream was doing around that time as well. WRT greening the Taklamakan, it is my understanding that it is one of the most desolate and challenging places on earth. CommentsLeave a comment about this article in the box below and share it with your Facebook friends.
These include irritable bowel syndrome, inflammatory bowel disease, Food allergies and inflammation or blockage of the digestive tract. Thus, many a times you may observe that though your cat eats a complete, nutritious meal it never puts on weight or continues to lose weight.
Feline leukemia, mammary cancer and sarcomas are the most commonly detected cancers in cats. It is caused due to the excess production of the thyroid hormone by a benign tumor on the thyroid gland. In this type of weight loss, you will notice that though your cat loses weight, it looks health.
Your cat maybe stressed or depressed if there is a new pet in the house, if there is excessive noise around, if they do not like a particular food brand or food dish or maybe because the food dish looks a lot like its litter dish.
Old age makes cats vulnerable to various chronic illnesses such as renal problems, heart diseases, feline hypertension, diabetes, Hepatic Lipidosis (fatty liver disease). He will perform a comprehensive physical examination, urinalysis and blood tests to rule out the exact cause of weight loss. Rabbits are very popular and harmless pets next toHow to Protect Your Pets From Very Hot Weather?
For research material I relied heavily on the use of the amazing amount of satellite derived reanalysis data as well as ground based observations. My research has also relied on men and women scientists who have physically travelled to extremely remote and desolate locations to gather data that I have relied on to create this synthesis.
His service in the cause of understanding the dramatic and rapid changes going on in the Arctic is to be highly commended. Scherhag and others used balloons with radiosondes and rocketsondes for their research, and the rather limited amount of data, especially limited in spatial and temporal coverage, that could be gathered this way led to interesting early theories of the causes of these events-- everything from volcanoes to solar activity.
No other atmospheric event of this scope and scale exists on the planet, yet more people are aware of the much smaller hurricane, cyclone, or tornado.
What we've learned in the past few decades however, is that they have enormous and profound effects (especially the larger ones) on the entire weather patterns of the Northern Hemisphere winter.
When the vortex breaks down or is disrupted, the winds shift rapidly (as shown in the chart above) and come from the east. In terms of the winter of 2013, we can trace the change in England's weather this winter almost to the day of the onset of the large SSW event over the pole. Rather than go into a detailed explanation of the AO Index, for the purposes of this paper it suffices to say that generally high pressure over the pole relative to lower latitudes leads to a negative AO Index and lower pressure over the pole relative to lower latitudes leads to a positive AO Index. What it does show, is that when a large SSW event occurs (which is every few years on average) it will tend to dominate the Arctic weather and lower latitudes during that time period. Of course the rapid descent of air in the stratosphere compresses and warms, but a key clue comes from knowing that it was already anomalously warm before it began to be compressed.
As this animation so excellently displays, a wave of warm air moved up from South Central Asia in the weeks prior to the SSW event that occurred in early January 2013.
The rapidity with which this wave forms, indicates that some very strong dynamical event was forcing warm air up into the stratosphere from the troposphere. Again, I found similar waves are seen in the weeks before every SSW event, minor or major, over the NH that I was able to find reliable data on.
First, such a rapid build-up of rising warm air can obviously not come from evaporation as normal adiabatic cooling would occur and we would see the exact opposite condition such as we find associated with the normal convective processes in thunderstorms or on a larger scale in Hadley Cells. Other factors however did not support the volcanic theory, not the least of which was the lack of other normal signs associated with volcanoes such as elevated levels of volcanic aerosols. It would have to be an area that displayed what would be much like vertical jet stream or plume of warm air moving rapidly upward in the troposphere, through the tropopause, to form the bubble or thermal wave in the stratosphere. These regions represent areas where air was moving rapidly upward across the entire troposphere averaged over the month. This stream would be flowing up through the entire depth of the troposphere, centered at 85E and 37.5N during the month of December 2012. So we at least now have a potential area for a vertical stream of air moving into the stratosphere to form our thermal wave in December 2012. These mountain ranges collectively form the southern border of the Tarim Basin and Taklamakan Desert and mark the northern edge of the Tibetan Plateau.
In the red and orange areas in this region - since this omega is averaged over the month and across the entire troposphere - a large mass of air is streaming at a high rate through topographic forcing, through the tropopause and up into the stratosphere. It is also possible, and much further research would need to occur for verification, that given the general lowering of the winter tropopause and the elevations involved in the region, that jet stream winds could dip lower in the area and be integrally involved in providing some of the energy for the topographic lift.
Through reanalysis, we have seen that the air traveled to the high latitudes as a stratospheric thermal wave at 10 hPa.
This intrusion of mesospheric air during SSW events has been well documented, but is outside the scope of my research.


Here we see that the momentum of the polar descending air pulls the air in the stratosphere up at the equator, such that this air cools and expands and creates a temporary temperature and pressure anomaly.
Certainly, the intrusion of a rapidly ascending stream of warm air into the stratosphere from the troposphere means that this stream must penetrate through the tropopause as it ascends.
It is quite possible that had these mountain ranges been located five hundred hundred kilometers further south where the tropopause is higher, that the character of NH SSW's and NH winters might be completely different. This air is then advected as a thermal wave toward the northern latitudes where it eventually descends, warms further, and creates an SSW event.
A high level of dust inside that thermal wave that could be identified through isotopic analysis as coming from the Taklamakan Desert and Tarim Basin would be strong evidence of the origin of the warm air. In addition to pressure zones and prevailing winds, energy from the lowering of the tropopause and the jet stream during winter could be an important source of energy for high positive omega events and the precursors to SSW's.
Since SSW's play a role in the Warm Arctic Cold Continents phenomenon (at least that's what I assume), would it make sense to green the Taklamakan Desert to prevent all that warm air to build up and then get swung upwards against those mountain ranges?
If you looked before Dec 21, 2012, for example, would you find a period of low wind over this area? Without knowing what causes the anomalous warming in the first place, it is hard to say what would work. These gastrointestinal problems give rise to vomiting, diarrhea, poor appetite which eventually leads to decreased weight.
Intestinal parasites may also cause vomiting, diarrhea, bloating and difficulty in breathing.
Symptoms of feline cancer manifest in the form of loss of appetite, vomiting, lethargy and troubled breathing. Hyperthyroidism may boost your cat’s appetite, but simultaneously it could result in muscle wasting, diarrhea and vomiting. Pet cats may also display behavioral changes if there is a change in the environments or if new members come home such as a baby or guests. I am heavily indebted to organizations such as NASA, NCAR and NOAA for the data they have made available at my fingertips through the web.
I hope perhaps one day to travel myself to these remote places to see first hand what I feel are the true birthplaces of Sudden Stratospheric Warming events. And as you'll see, far more people are affected by a large SSW event than a large hurricane, yet the average citizen has scarcely heard of them. In places like northern Europe, when the winds come from the east of course that brings cold air from Siberia, stormier weather and much colder temperatures. Generally speaking, when the AO Index is high, we can expect generally better and warmer weather over lower latitudes during that period in the winter, and when the AO Index goes negative or even very negative, we can expect generally nastier and colder weather over lower latitudes.
Using reanalysis data back to 1948, I found no example of the thermal wave forming anywhere else other than over Asia prior to NH SSW events. Finally, the air must be relatively warm to begin with (anomalously warm relatively to normal stratospheric temperatures at 10 hPa), for no matter how rapidly it is launched or how warm it was, it will expand and cool by some amount, no matter what.
Generally, of course, the relatively flat Tarim Basin and Taklaman Desert give way to the Tibetan Plateau as you move south. In looking at the origins of this thermal wave we find high omega areas just south of the Taklamakan Desert in the Kunlun Shan and Altun Mountains.
Suffice to say it has been measured by many researchers and can be identified through its unique chemical signature. This diagram illustrates the overall dynamics of this entire process:In addition to the extensive reanalysis data, there appears to be tangential corroborating evidence in support of this overall dynamic, such as the high level of dust in Greenland ice cores that has an origin point in the Taklamakan desert and Tarim Basin. Other avenues of research should include the analysis of other regions of South Central Asia that also show high positive omega values in the days leading up to the formation of the 10 hPa thermal wave. I'm not sure what would allow the desert air to accumulate heat, given that the cloudless air from low humidity usually allows all the heat to escape to space overnight. Diabetes is one of the primary reasons for weight loss in cats as it results in loss of appetite. Great impact is observed on metabolic processes and appetite of the cat thus resulting in weight loss. I do however think I probably know quite a bit more on the subject than the average person might. This large scale shift of NH winds from westerly to easterly affects hundreds of millions of people from the associated extreme cold, snow, and general misery.
Now, once the wave forms and moves north it can actually rotate to the east around the pole (and even migrate back west), before penetrating the vortex at some point and descending, but in my research, the initial formation of the thermal wave was found to always be over Asia.
So in our search for the source of the thermal wave, we are looking for a source of warm air and a mechanism by which that air is launched rapidly upward into the stratosphere. If these samples contain isotopes from the Taklamakan desert, it would provide some confirmation of the correctness of my overall SSW model. This dust could be part of the thermal wave that descends over the Arctic during the SSW and is eventually deposited in Greenland ice. Other symptoms of diabetes in cats include frequent urination, urinary tract infections, sluggishness and sweetly scented breath. I work as a television producer by day, and as a hobby, study climate and weather on my nights and weekends and have for over 30 years. Knowing Your Pet’s Life   You should know how long your pets will live so10 Signs and Symptoms of Dog Pregnancy   How to tell if your dog is pregnant? Irrespective10 Tips How to Choose the Right Toy for Your Cat In order to engage your cat and to develop its7 Tips How to Choose The Pet Carrier   The pet carrier should be chosen in a careful way7 Food Your Cat Should Never Eat   If you are managing cat as your pet, enough careWhy Dog and Cat are Enemies? Most of the people believe that dogs and cats are10 Tips How to Choose the Right Toy for Your Dog Toys are very important means to let the dog play andHow do Parrots Talk?



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