September 22, 2015
What a perfect photo from the Pictured Rocks National Lakeshore for the last day of summer as we prepare to make the leap into autumn tomorrow.
September 21, 2015
Shots like these help me remember that behind every great photo, there’s someone who went through all the time and effort to get out there and take it.
Thanks so much to all of you photographers who share your work with me – there’s no way I could do what I do without all of your time, effort and love of Michigan.
More fall wallpaper on Michigan in Pictures.
September 15, 2015
Here’s a pretty cool shot taken last weekend from high above the Sleeping Bear Dunes National Lakeshore and Lake Michigan. For reference, if he took this from where I think he did, those people are above a dune bluff that’s several hundred feet high.
September 11, 2015
August 31, 2015
Confession: I probably don’t give Silver Lake Dunes State Park enough love. What an incredible place.
In Scientific American Robert S. Anderson, associate professor of earth sciences at the University of California at Santa Cruz explains why regular, wavelike shapes form when the wind blows over the sand on the beach for a long time:
Ripples in sand, found on both beaches and dunes, are one of nature’s most ubiquitous and spectacular examples of self-organization. They do not result from some predetermined pattern in the wind that is somehow impressed on the surface, but rather from the dynamics of individual grains in motion across the surface. They arise whenever wind blows strongly enough over a sand surface to entrain grains into the wind. The subsequent hopping and leaping of these grains is called saltation. Saltating grains travel elongated, asymmetric trajectories: Rising relatively steeply off the bed, their path is then stretched downwind as they are accelerated by drag forces. They impact the sand surface centimeters to tens of centimeters downwind, typically at a low angle, around 10 degrees. It is this beam of wind-accelerated grains impacting the sand surface at a low angle that is responsible for ripples.
“An artificially flattened sand surface will not remain flat for long. (Try it on the beach or on the upwind side of a dune and see for yourself.) Small irregular mottles in the sand surface, perhaps a couple centimeters in wavelength, rapidly arise and grow once the wind starts to blow hard enough to initiate saltation. They then slowly organize themselves into more regular waves whose low crests are aligned perpendicular to the wind direction and begin to march slowly downwind. Typical ripple spacing is about 10 centimeters, whereas the typical height of the crests above the troughs is a few millimeters. The pattern is never perfect, but instead the ripple crests occasionally split or terminate, generating a pattern that looks remarkably like one’s fingerprint.
Read on for a whole lot more including Michigan Sea Grant educator Walt Hoagman explaining how the speed of wind (and water) over sand influences the waves.
August 24, 2015
Summer of 2015 has definitely featured some wild weather. Photographer Joe Gee captured this dramatic photo last Monday at Muskegon State Park. mLive featured Joe’s waterspout photo along with an explanation of the phenomenon by meteorologist Mark Torregrossa:
This is the waterspout season on the Great Lakes, but tonight’s waterspout did not occur in the classic waterspout weather pattern.
Waterspouts form mostly due to a large temperature difference between the water surface and the air a few thousand feet above. So the classic waterspout weather pattern would have a large, cold upper level storm system moving over the Great Lakes. That storm system is still well to our west, and won’t pass through until Wednesday.
This waterspout still most likely formed due to a temperature difference between the water and the air. The cold air aloft wasn’t really detectable because it was so isolated.
The other weather feature probably contributing to the development of this waterspout was a lake breeze or even possibly an “outflow boundary” from another storm. The lake breeze blows a different wind direction into the storm and can cause additional rotation. An outflow boundary coming off another thunderstorm can do the same thing.
So this waterspout is a less threatening rotation as compared to a tornado. Usually these waterspouts dissipate before they come onshore.
This time of year is the typical time for waterspouts because of two weather features. First, the Great Lakes water temperatures are usually warmest right now. Secondly, we have to mention the word fall. Cooler, fall-like air starts to move in at this time of year. The temperature difference is largest now through September.
More wild weather on Michigan in Pictures!
August 19, 2015
The National Park Service has opened a formal public comment period that will close on August 29, 2015 regarding future management options for wolves in Isle Royale National Park. The wolf population has plummeted because of a lack of gene flow from the mainland and park management is considering an array of options. If you have commented before, do it again as anything preceding the current comment period is now considered informal input and won’t be considered further.
Moose have important effects on island vegetation, including forest cover, and wolves are the only moose predator on the island. The wolf population on Isle Royale is very low. With their long-term survival on the island in question, the moose population is likely to increase in the short term (5-10 years), which could result in impacts to vegetation and forest cover because of over-browsing.The six plan options they lay out in this PDF are:
- No-action alternative: Current management would continue; the park would not actively manage vegetation or the moose and wolf populations
- Introduce wolves once: Reestablish wolves on the island by bringing in new wolves one time to mimic a migration event; no moose management
- Maintain both species: Maintain populations of moose and wolves on the island, which could include wolf reintroduction or augmentation
- Introduce wolves once and reduce the moose population: Reestablish wolves on the island by bringing in new wolves one time; reduce moose density if/when the wolf population is no longer impacting the moose population and moose herbivory is having a demonstrated impact on park resources
- Reduce moose population: No wolf reintroduction or augmentation; reduce moose density if/when the wolf population is no longer impacting the moose population and moose herbivory is having a demonstrated impact on park resources
- Intensively manage the moose population: No wolf reintroduction or augmentation; intensively manage moose population to a low level; potential for direct vegetation restoration through seed gathering and planting on offshore islands
Click over for more and to comment.
The Wolf Moose Project on Isle Royale is the longest continuous study of any predator-prey system in the world. Rolf Peterson began leading the wolf moose project in the early 1970s, and remains a world authority on wolves and moose. About this photo he says:
It was a remote camera photo that I set up. It shows the alpha male in the Chippewa Harbor Pack in 2009, revisiting the remains of a moose the pack killed in the adjacent pond the previous autumn. The wolves managed to yank the remains out of the pond the next summer and consume the rotting carcass.
You can view this photo background bigtacular and follow the Wolves & Moose of Isle Royale on Facebook for updates.
More wolves on Michigan in Pictures.