After a hot, dry summer and fall, drought conditions are retreating in most parts of Iowa. Last week, the Southern part of the state saw heavy rainfall, reducing drought conditions. The most rain seen was 4.3 inches with the lowest amount around 2 inches.
The state had been in the worst drought in nine years and desperately needed rain, with northwest Iowa receiving the brunt of the effects. The rain missed this part of the state, not reviving any of the stress the drought has caused. Currently, two-thirds of the state is still suffering from the drought
According to the Drought Monitor, above 10 percent of the state is listed as being in extreme drought or more severe. The area in extreme drought expands from Humboldt to Sioux City.
Justin Glisan, a state climatologist, said the statewide weekly average precipitation was 1.01 inches above normal during the week of July 4, sitting at 2.12 inches.
The U.S. Department of Agriculture reported Monday that 72 percent of topsoil was rated adequate and three percent sat rated very short. Subsoil moisture condition was rated 66 percent adequate and 22 percent short.
Although some of Iowa’s crops are in better condition than before the rain, Ohio farmers are still concerned about the impact of the dry period on crops. As of July 10, soil in Ohio sits at 73 percent adequate and just 7 percent of soil contains surplus moisture.
If droughts continue, crop size and quality can decrease, crop prices can increase, and crop cleaning practices may lessen with a lack of water.
This past September was the 15th wettest September on record for Iowa, according to the Iowa Department of Natural Resources. This has been able to remove drought locations that happened over the dry summer months.
Iowa’s average rainfall amounted to 6.17 inches — 2.79 inches above normal for September. The temperature average to 68.2 degrees, making it the ninth warmest September on record. While it has been able to offset drought damage, the DNR stated in a press release that saturated soils make the state vulnerable to flooding if rainfall continues.
The National Oceanic and Atmospheric Administration found that June 2018 to May 2019 were the wettest 12 months on record for Iowa since 1895. Iowa received extreme flooding in the spring from the Missouri River. Early snow melt from not only Iowa, but also South Dakota and Minnesota, contributed to the rising water levels in the river.
Iowa also received heavy rainfall, which some reports attributed to a changing climate and warm ocean temperatures. In the June to May time frame, Iowa received 50.73 inches of rain.
Effects of the changing climate in Iowa were seen into the summer months. The Iowa Climate Statement was released Sept. 18, which outlined trends in temperatures and how Iowa can expect more 90 degree days in a year. The report also serves as a warning to Iowans and Midwesterners to expect extreme heat, and provides guidelines on how one can properly prepare.
The editorial’s authors did a literature review of 124 studies which assessed the link between climate change and war or civil unrest. They claim to have found three kinds of sampling biases among the studies. First, researchers overwhelmingly looked at regions where violence was already happening or had happened recently. Second, they noted that the studies primarily included countries in Africa and left out other nations that have been severely impacted by climate change. Finally, the mostly-white, Western researchers usually chose to study countries that were easily accessible to them and where the locals spoke English; think countries like Kenya.
Tobias Ide studies peace and war at the Georg Eckert Institute for International Textbook Research and is one of the paper’s authors. He said to The Atlantic, “If we only look at places where violence is, can we learn anything about peaceful adaptation to climate change? And if we only look at those places where there is violence, do we tend to see a link because we are only focusing on the places where there is violence in the first place?”
Solomon Hsiang has been openly critical of the paper’s claims. Hsiang’s 2013 findings showed that for every standard deviation change in precipitation or temperature, the likelihood that an area will experience civil unrest rises by 14 percent. The University of California Berkeley economist and public policy professor said in an email to The Atlantic, “Studying conflict-prone regions isn’t a problem, it’s what you would expect. Nobody is studying Ebola outbreaks by studying why Ebola is not breaking out in cafés in Sydney today, we study what happened in West Africa when there was an actual event.”
Either way, the paper draws attention to the myriad opportunities for study of climate change and conflict in countries outside of Africa and the Middle East. Ide said, “I was a bit surprised that even within American studies, there’s not really a focus on Latin America, basically. You can be concerned about Iraq, Syria, or India because of geopolitical relevance—but why not look for [climate-related conflict] in Mexico, or Honduras, or Brazil? Because that would have much sharper consequences for the United States.”
Jonathan Godt of the U.S. Geological Survey told the New York Times, “It was pretty rare, in essence a worse-case scenario from that standpoint. The same rainfall that falls on a burned landscape can cause a lot more damage than it would before a fire.”
AccuWeather officials have predicted that a shift in the jet stream will bring more moisture from the Pacific Ocean into southern California’s atmosphere by January 23rd and 24th. They caution that the weather pattern presents the risk for “locally heavy rainfall, flash flooding and a significant risk of mudslides.” Their report states that areas surrounding Point Conception, California are most likely to be affected.
February and March are heavy precipitation months for Santa Barbara county, and following California’s record-setting year for wildfires, conditions are right for faster-moving and more destructive landslides.
AccuWeather meteorologist Evan Duffey said, “People need to leave the area by evacuation deadlines as they are given. Once a mudslide begins, there may only be minutes to seconds before a neighborhood is wiped out.”
Last month was the driest month since 2007 according to state climatologist Harry Hillaker.
Hillaker spoke with Radio Iowa this week and said, “Overall a state average of .43 of an inch of moisture for the month, which is about 20 percent of what is usual. And actually the driest of any calendar month going back to November of 2007.”
Conditions were abnormally dry at all monitoring stations, especially in northwestern Iowa, where some areas of Ida county and Cherokee county received zero precipitation last month. The whole state only saw a minuscule amount of snow for the eighth time in Iowa’s 131-year weather record. Hillaker said, “The statewide average was just a trace of snow and typically we’d get three to four inches of snow during the month of November.”
While there were some colder days in the beginning of November, warmer than average temperatures during the second half of the month made snowfall even less likely. The climatologist pointed out that there was virtually no precipitation in the state after the 18th of November.
November wraps up the fall season of September, October and November. Although November 2016 brought record-high temperatures, Iowa Environmental Mesonet reports that temperatures for last month were near average.
The assessment, which is projected to be complete in late 2018, is required through the Global Change Research Act (GCRA) of 1990 to “analyze the effects of global change on the natural environment, agriculture, energy production and use, land and water resources, transportation, human health and welfare, human social systems, and biological diversity.”
Findings from the report are separated into several geographic regions of the United States, with Iowa included among the Midwestern states. Scientists say that Iowans and others in the Midwest region can expect longer growing seasons and increasing carbon dioxide levels to bump yields for some crops, but that positive effect will be reversed over time. As the climate continues to change, increased humidity, severity and frequency of heat waves along with poorer water and air quality are expected to endanger agricultural yields.
“Humidity has been going up for the last 30 years, and it continues to go up. This fields a number of different consequences, heavy rainfall, the 5, 6, or 7 inch rainfall events that we seem to be experiencing every year. We’re also experiencing a rise in both summertime and wintertime temperatures which are going to be bumping up against our crops.”
To drive home the economic impact of a changing climate, Takle added, “In 2013, we were not able to plant 700,000 acres in Northwest Iowa.”
Scientists point out that Midwesterners burn through 20 percent more carbon emissions per capita than the national average. That said, they argue, the region has incredible potential to take actions that reduce those emissions that cause climate change.
Rainfall in the last part of August helped to lift many parts of Iowa out of drought conditions, but some parts of the state are still experiencing extreme drought, according to the latest Water Summary Update.
The Water Summary Update is a succinct monthly report of Iowa’s water resources and those events that affect them prepared by the technical staff at Iowa DNR, the Iowa Department of Agriculture and Land Stewardship, IIHR—Hydroscience and Engineering, and the U.S. Geological Survey, in partnership with Iowa Homeland Security and Emergency Management Department.
The latest summary revealed that while August started off very dry, high rain totals increased groundwater levels and streamflow in many parts of the state. The total area of the state classified as experiencing drought or dryness decreased from over 70 percent at the beginning of the month to 55 percent this week. In contrast, south central Iowa is still experiencing D2 and D3 drought conditions. Clarke county and Wapello county are seeing the most extreme dryness.
Researchers point out that August temperatures this year have been about three to four degrees cooler than normal, on average. Lower temperatures slow down evaporation rates and provide a protective factor for crops in drought-stricken areas.
To follow Iowa DNR’s regular water summary update, visit their website here.
A recent study by the Pew Charitable Trusts generated flood risk scores for 84,123 primary and secondary schools nationwide.
The report’s authors pointed out that flooding is the most costly and common natural disaster, affecting every region of the U.S. Many times, severe floods badly damage schools, causing them to close. For example, the study points out, floods in West Virginia in June 2016 cost $130 million in damage to regional schools.
Researchers used three metrics to generate county-wide composite flood risk vulnerability scores for schools in all fifty states including: a school’s location within a designated flood zone, the percentage of a school’s neighborhood (as represented by ZIP code) located within a flood zone, and the number of historical flood-related federal disaster declarations in that county.
Among the study’s major findings are that flood risk is distributed across diverse regions of the country. Schools with the highest flood risk scores were located in the Atlantic Coast, Gulf Coast, Mississippi River corridor, and southwestern Arizona. Similarly, those schools with the highest composite flood risk scores were located in both coastal and inland regions. Those 100 counties with the highest composite flood risk scores include 6,444 schools that serve almost 4 million students.
The study made some recommendations for steps policymakers can take to increase flood resiliency for schools. They included generating up-to-date local flood maps, developing pre-disaster flood plans for schools, working to leverage federal assistance, and relocating schools out of floodplains if possible.
The Pew Charitable Trusts full analysis can be found here.
Researchers at the University of Illinois recently released a study that predicts the impact climate change will have on agriculture in the state.
The research article, published in PLOS One, centers around one variable called “field working days.” This term refers to the days during which the weather is suitable for farmers to plant, till, monitor, or harvest crops. Adam Davis is a University of Illinois USDA Agricultural Research Service ecologist. Davis said, “Everything else flows from field working days. If you’re not able to work, everything else gets backed up. Workable days will determine the cultivars, the cropping system, and the types of pest management practices you can use. We’re simply asking, ‘Can you get in to plant your crop?”
Utilizing previously developed climate models, the researchers predicted the number of field working days for farmers in Illinois from 2046 to 2065 and from 2080 to 2099. The study modeled three possible trajectories ranging from mild to severe climate change.
Notably, the study predicts that the usual planting window for corn, April and May, will be too wet for planting in the future. Too much rain can be harmful for seedlings because it can wash them away or lead to harmful fungal and bacterial growth.
Davis said, “The season fragments and we start to see an early-early season, so that March starts looking like a good target for planting in the future. In the past, March has been the bleeding edge; nobody in their right mind would have planted then. But we’ve already seen the trend for early planting. It’s going to keep trending in that direction for summer annuals.”
While the spring months grow wetter, summer months are predicted to become drier and hotter, especially in the southern parts of Illinois. “Drought periods will intensify in mid- to late-summer under all the climate scenarios. If farmers decide to plant later to avoid the wet period in April and May, they’re going to run into drought that will hit yield during the anthesis-silking interval, leading to a lot of kernel abortion,” Davis explained.
The article offers two possible adaptations for farmers. They could opt for earlier planting of long-season varieties that should have enough time to pollinate before summer droughts, but they’d risk getting hit by a late winter storm. Or, the researchers suggest, farmers could plant short-season cultivars that are harvested prior to summer droughts. In this case, growers could be sacrificing yield due to the shorter growing season.
Either way, Davis said, farmers should begin considering how they can best adapt to the changing climate. He said, “Now is the time to prepare, because the future is here.”