Falling leaves and cooler temperatures are coming later than usual in Europe. With summer dragging its heels into September, autumn has been pushed back further in the year in a phenomenon known as seasonal creep.
Officially autumn begins in September in Europe, but the reality is that the signs we typically associate with the season are falling later and later: the reds, ambers and golden yellows of autumn foliage often fail to reach their peak until November.
Early bloom
It is with an ever-increasing frequency that we are marvelling at an early blossom; arbitrarily commenting on how unusual it is to see snowdrops so early in the year, or remarking on how prematurely birds are beginning to nest. In truth, the first signs of spring are coming early with alarming regularity.
When temperatures change, nature follows. In many parts of Europe, it’s frequently warmer in December and January than it used to be, and wildlife and flora react to this increase by coming out of hibernation accordingly. Growing season starts sooner than you might expect in Europe, with some of the earliest spring flowers making an appearance in January.
Extreme heat
Extreme summers are becoming the norm, where once they were outliers. Eight of the top 10 hottest years on our planet have occurred in the last decade. It’s not unusual to see wildfires and drought in Europe from late June through to August – even countries in northern Europe are no longer exempt.
Heatwaves and drought were once more notable events, but are becoming routine. 2022, however, has marked a year of particularly astonishing high temperatures. The highest recorded was 47°C in June in Pinhão, Portugal, while several temperature records were broken in France and the UK. The latter of which surpassed 40°C for the first time in recorded history.
This pattern of intense heatwaves in summer could have long-term consequences for Europe. Grass and plants that once thrived in our respective climates may struggle, risk of wildfires may increase and outdoor-based workers will deal with increased health risk concerns in the extreme heat.
Pests and insects
Pests and insects may seem an afterthought when compared to the dramatic, Earth-changing events of a seasonal shift and more droughts and floods. But insect populations are fluctuating due to changing temperatures, and we are yet to see the true impact of this issue.
Some insect species are thriving, while others are beginning to disappear. Pollinators like bees and butterflies have been disproportionately affected. Fewer pollinators will eventually lead to a reduction in the diversity of plant species, and some plants may begin to disappear altogether.
While pollinators are on the decline, pest insect populations are booming, as other species are migrating into Europe due to warmer temperatures. Greater numbers of insects, such as the hummingbird hawk-moth in Northern Europe, will bring new problems for gardens and wildlife, as a lack of natural predators will see rising numbers feeding on plants and crops. Alongside insects, warmer temperatures earlier in the year may, through additional stresses, encourage the spread of diseases among plants and grass.
Extreme rainfall: floods in winter, drought in summer
Rainfall events, such as heavy rainfall in winter and drought in summer, are likely to become more extreme in the future if the current trend continues.
While most of Europe will see minimal – if any – rainfall in the summer months, the winter can bring torrential rains. Of course, even a drought brings risk of flooding, as the parched ground is unable to absorb water when rain eventually falls, increasing the danger of flash floods. These extreme weather swings can also be extended to frost and snow storms in winter, which we are seeing flurries of in Europe; rather than a steady, predictable stream of cold weather, we are seeing bursts of extreme snowfall in between weeks of mild weather. This is caused by weaknesses in the gulf stream created by rising temperatures, which can leave Europe exposed to arctic blasts of icy weather.
How will these seasonal shifts affect landscapers?