Tips on how to spot the 2022 Perseid meteor shower – StrathmoreNow.com
The Perseid meteor shower will peak this year early Saturday morning over Cochrane.
Local photographer, Dylan Kaniski is gearing up for some sleepless nights to ensure the perfect shot. “I’m always really excited for this meteor shower, it is one of the biggest of the year and we always get a lot of great meteors.”
Meteor showers are clouds of debris left when comets zoom past Earth on their way around the sun. The Perseids come from the comet Swift-Tuttle, which was last visible in 1992. While Cochranites won’t be seeing the comet again until 2125, in the meantime, sky gazers can enjoy the yearly shower from the debris.
“It does change every year and some years are better than others. But this one is special because the Perseids are pretty consistent from year to year. I usually get a really good shot and that’s why people are really excited about this.”
Unfortunately, a full moon will make it trickier to see this year but Kaniski has plenty of tips for people looking to experience the Perseids for the first time.
“The best way to view the meteor shower is to first get somewhere dark. It doesn’t have to be anywhere super far. I personally like going to the mountains but anywhere around Cochrane, you can go to the countryside just 10 minutes out of town.”
“If you can’t make it out of town, just go into a local park or even turning your back to any streetlights and just letting your eyes adjust is going to help out.”
He also believes you don’t need top-of-the-line photography equipment to get breathtaking shots.
“You don’t need any fancy equipment or anything special. Meteors do move quite fast and they’re usually quite bright so you don’t really have any struggles capturing them with any-level cameras.”
“For advice on cameras, I like to do a higher ISO around like 6,400 and usually a 20-second exposure time. If people are heading out and want to capture it with their cameras, I suggest using a focal length that’s a little bit tighter because a lot of meteors can be a bit smaller, and having a tighter focal length will allow you to emphasize the size of the meteor. Something like 20 to 35 millimeters is what I would recommend.”
”I’d stay away from the super wide angle lenses that you see a lot of nighttime and landscape photographers using.”
While the 2022 Perseid meteor shower will peak early on August 13, 2022, meteors could be visible on clear nights leading up to and past Saturday morning.
Deep Impact: Heat Waves Happen at the Bottom of the Ocean Too – SciTechDaily
First assessment of bottom marine heat waves opens a window on the deep.
The 2013-2016 marine heat wave known as “The Blob” warmed a vast expanse of surface waters across the northeastern Pacific, disrupting West Coast marine ecosystems, depressing salmon returns, and damaging commercial fisheries. It also prompted a wave of research on extreme warming of ocean surface waters.
But, as new research from the National Oceanic and Atmospheric Administration (<span class="glossaryLink" aria-describedby="tt" data-cmtooltip="
” data-gt-translate-attributes=”["attribute":"data-cmtooltip", "format":"html"]”>NOAA) shows, marine heat waves also happen deep underwater.
In a paper published in the journal <span class="glossaryLink" aria-describedby="tt" data-cmtooltip="
” data-gt-translate-attributes=”["attribute":"data-cmtooltip", "format":"html"]”>Nature Communications on March 13, a team led by NOAA researchers used a combination of observations and computer models to generate the first broad assessment of bottom marine heat waves in the productive continental shelf waters surrounding North America.
“Researchers have been investigating marine heat waves at the sea surface for over a decade now,” said lead author Dillon Amaya, a research scientist with NOAA’s Physical Science Laboratory. “This is the first time we’ve been able to really dive deeper and assess how these extreme events unfold along shallow seafloors.”
Marine heat waves dramatically impact the health of ocean ecosystems around the globe, disrupting the productivity and distribution of organisms as small as plankton and as large as whales. As a result, there has been a considerable effort to study, track and predict the timing, intensity, duration, and physical drivers of these events.
Most of that research has focused on temperature extremes at the ocean’s surface, for which there are many more high-quality observations taken by satellites, ships, and buoys. Sea surface temperatures can also be indicators for many physical and biochemical ocean characteristics of sensitive marine ecosystems, making analyses more straightforward.
About 90% of the excess heat from global warming has been absorbed by the ocean, which has warmed by about 1.5C over the past century. Marine heatwaves have become about 50% more frequent over the past decade.
In recent years, scientists have increased efforts to investigate marine heat waves throughout the water column using the limited data available. But previous research didn’t target temperature extremes on the ocean bottom along continental shelves, which provide critical habitat for important commercial <span class="glossaryLink" aria-describedby="tt" data-cmtooltip="
” data-gt-translate-attributes=”["attribute":"data-cmtooltip", "format":"html"]”>species like lobsters, scallops, crabs, flounder, cod, and other groundfish.
Due to the relative scarcity of bottom-water temperature datasets, the scientists used a data product called “reanalysis” to conduct the assessment, which starts with available observations and employs computer models that simulate ocean currents and the influence of the atmosphere to “fill in the blanks.” Using a similar technique, NOAA scientists have been able to reconstruct global weather back to the early 19th century.
While ocean reanalyses have been around for a long time, they have only recently become skillful enough and have high enough resolution to examine ocean features, including bottom temperatures, near the coast.
The research team, from NOAA, Cooperative Institute for Research in Environmental Sciences (CIRES), and National Center for Atmospheric Research (NCAR), found that on the continental shelves around North America, bottom marine heat waves tend to persist longer than their surface counterparts, and can have larger warming signals than the overlying surface waters. Bottom and surface marine heat waves can occur simultaneously in the same location, especially in shallower regions where surface and bottom waters mingle.
But bottom marine heat waves can also occur with little or no evidence of warming at the surface, which has important implications for the management of commercially important fisheries. “That means it can be happening without managers realizing it until the impacts start to show,” said Amaya.
In 2015, a combination of harmful algal blooms and loss of kelp forest habitat off the West Coast of the United States—both caused by The Blob – led to closures of shellfisheries that cost the economy in excess of $185 million, according to a 2021 study. The commercial tri-state Dungeness crab fishery recorded a loss of $97.5 million, affecting both tribal and nontribal fisheries. Washington and Californian coastal communities lost a combined $84 million in tourist spending due to the closure of recreational razor clam and abalone fisheries.
In 2021, a groundfish survey published by NOAA Fisheries indicated that Gulf of Alaska cod had plummeted during The Blob, experiencing a 71% decline in abundance between 2015 and 2017. On the other hand, young groundfish and other marine creatures in the Northern California Current system thrived under the unprecedented ocean conditions, a 2019 paper by Oregon State University and NOAA Fisheries researchers found.
Unusually warm bottom water temperatures have also been linked to the expansion of invasive lionfish along the southeast U.S., coral bleaching and subsequent declines of reef fish, changes in survival rates of young Atlantic cod, and the disappearance of near-shore lobster populations in southern New England.
The authors say it will be important to maintain existing continental shelf monitoring systems and to develop new real-time monitoring capabilities to alert marine resource managers to bottom warming conditions.
“We know that early recognition of marine heat waves is needed for proactive management of the coastal ocean,” said co-author Michael Jacox, a research oceanographer who splits his time between NOAA’s Southwest Fisheries Science Center and the Physical Sciences Laboratory. “Now it’s clear that we need to pay closer attention to the ocean bottom, where some of the most valuable species live and can experience heat waves quite different from those on the surface.”
Reference: “Bottom marine heatwaves along the continental shelves of North America” by Dillon J. Amaya, Michael G. Jacox, Michael A. Alexander, James D. Scott, Clara Deser, Antonietta Capotondi and Adam S. Phillips, 13 March 2023, Nature Communications.
The SpaceX steamroller has shifted into a higher gear this year – Ars Technica
Is it possible that SpaceX has succeeded in making orbital launches boring? Increasingly, the answer to this question appears to be yes.
On Friday the California-based company launched two Falcon 9 rockets within the span of just a little more than four hours. At 12:26 pm local time, a Falcon 9 rocket carried 52 of SpaceX’s own Starlink satellites into low-Earth orbit from a launch pad at Vandenberg Space Force Base in California. A mere 4 hours and 12 minutes later, another Falcon 9 rocket delivered two large communications satellites into geostationary transfer orbit for the Luxembourg-based satellite company SES from Kennedy Space Center.
This broke SpaceX’s own record for the shortest time duration between two launches. However, the overall record for the lowest time between two launches of the same rocket still belongs to the Russian-built Soyuz vehicle. In June 2013, Roscosmos launched a Soyuz booster from Kazakhstan, and Arianespace launched a Soyuz from French Guiana within two hours. Those launches were conducted by two separate space agencies, on separate continents, however.
Friday’s launch of the two SES satellites was, overall, SpaceX’s 19th orbital mission for the calendar year. As of today, the company is launching a Falcon rocket every 4.1 days and remains on pace to launch approximately 90 rockets before the end of 2023.
To put this into perspective, a decade ago, the United States launched an average of 15 to 20 orbital rockets a year, total. In 2022, the United States recorded its most launches in any calendar year, ever, with 78 orbital flights. This year, barring a catastrophic accident with the Falcon 9 booster, that number will easily get into triple digits. The all-time record for orbital launches in a single year is held by the Soviet Union, with 101, in 1982.
A decade ago, SpaceX was still an upstart in the global launch industry. In the year 2013, it launched the Falcon 9 rocket a grand total of three times in a single year for the first time. This was actually a pretty monumental achievement for the company, as it introduced both its second launch pad at Vandenberg Air Force Base and a substantially upgraded variant, 1.1, of the Falcon 9 rocket. It also flew commercial missions for the first time and began experimenting with ocean-based landings.
In that competitive environment a decade ago, SpaceX still lagged far behind its main competitors, including Roscosmos, Europe-based Arianespace, and US-based United Launch Alliance. This year those numbers have swung massively around. Through today, Russia has launched three rockets, two Soyuz and one Proton, in 2023. Arianespace has yet to launch a single mission, and nor has United Launch Alliance.
No longer a competition
Put another way, SpaceX’s main competitors over the last decade have launched three rockets this year. SpaceX, by comparison, just launched three rockets in three days, including the CRS-27 mission flown for NASA on the evening of March 14. Increasingly, only the combined efforts of China’s government and its nascent commercial launch sector can pose a challenge to SpaceX’s launch dominance. That nation has a total of 11 orbital launches this year.
SpaceX founder Elon Musk has said he would like the launch industry to achieve airline-like operations with rockets one day. His company is not there yet, as it takes a couple of weeks to land, refurbish, and relaunch a Falcon 9 first stage. Each mission still requires a brand-new second stage. And the fastest turnaround time at its three launch pads, Cape Canaveral and Kennedy Space Center in Florida, and Vandenberg in California, is still about a week for each facility.
But they sure have come a long way in a decade.
Scientists Identify Intense Heatwaves At The Bottom Of Ocean
Global warming is causing temperature across the globe to rise. The rate has increased in the last decades, with climatologists warning of the extreme effects that the mankind has to experience. The scientists have also been tracking temperature data streaming in from ocean surfaces. But in a shocking discovery, they have found that marine heatwaves can unfold deep underwater too, even if there is no detectable warming signal above. The discovery is based on new modelling led by researchers at the US National Oceanic and Atmospheric Administration (NOAA).
The research detailing the underwater heatwave has been published in Nature Communications.
“This is the first time we’ve been able to really dive deeper and assess how these extreme events unfold along shallow seafloors,” the study’s lead author Dillon Amaya, a climate scientist with NOAA’s Physical Science Laboratory, is quoted as saying by Science Direct.
It is based on the analysis of underwater temperature of continental shelf waters surrounding North America.
“This research is particularly significant as the oceans continue to warm, not only at the surface but also at depth, impacting marine habitat along continental shelves,” said co-author Clara Deser.
The scientists found that marine heatwaves can be more intense and last longer than hot spells at the ocean surface, though it varies from coast to coast.
The simulations found that bottom marine heatwave and surface marine heatwave tend to occur at the same time in shallow regions where surface and bottom waters mingle. But in deeper parts of the oceans, bottom marine heatwaves can develop without any indication of warming at the surface.
Temperature spikes along the seafloor ranged from half a degree Celsius up to 5 degrees Celsius, the research further found.
According to NOAA, marine heatwaves are periods of persistent anomalously warm ocean temperatures, which can have significant impacts on marine life as well as coastal communities and economies.
According to data, about 90 per cent of the excess heat from global warming has been absorbed by the ocean, which has warmed by about 1.5 degrees Celsius over the past century.
So, What Was Bad About The ‘Diablo 4’ Beta? – Forbes
More dead birds found in Caledon could be linked to bird flu | inBrampton – insauga.com
Deep Impact: Heat Waves Happen at the Bottom of the Ocean Too – SciTechDaily
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